Shingled Harissa Maple Sweet Potato Tian Casserole

My Harissa Maple Sweet Potato Tian is a show-stopping side dish that’s a fun, spicy twist on typical holiday fare. Thinly sliced sweet potatoes are combined with a fiery North African chili paste and sweet maple syrup, then shingled and baked as a sort of casserole to get a golden brown crispy top. Fusion food at its finest!

If you're looking to shake up your Thanksgiving or Christmas menu this year, give this spicy shingled sweet potato casserole a shot. It's perfect for pairing with other vibrant, tongue-tingling dishes like my tandoori-spiced Dutch oven turkey breast, tangy cranberry jalapeño relish, and fall kale salad with spicy chickpeas and tahini dressing.

Jump to:

• What is a Tian? 
• And what the heck is Harissa?
• Why You’ll Love This Easy Veggie Side Dish
• Ingredients & Substitutions
• How to Make Maple Harissa Sweet Potato Tian
• Optional Variations & Dietary Adaptations
• Expert Tips 
• Serving Suggestions
• Storage Instructions
• More Non-Traditional Holiday Recipes
• Harissa Maple Sweet Potato Tian
• 💬 Reviews

What is a Tian? 

A tian (pronounced “tee-ahn”) is a classic Provençal dish that’s all about simple ingredients layered artfully and baked until tender. Traditionally, thin slices of vegetables are shingled in a shallow dish, then drizzled with olive oil, herbs, and seasonings before going into the oven. As it bakes, the veggies soften, concentrate in flavor, and create their own almost-jammy sauce.

If it’s giving Disney ratatouille vibes, you’re not wrong—ratatouille is essentially a type of tian with a specific mix of summer vegetables. But a tian is more of a technique than a recipe. In this harissa maple sweet potato version, you get the same classic structure, but with a bold, modern twist. It’s cozy, elegant, and just as good for weeknights as it is for holiday tables.

And what the heck is Harissa?

Harissa is a chili paste from North Africa that packs bold, smoky heat with a surprising amount of depth. Generally speaking, it’s made from a blend of dried red chiles, garlic, olive oil, and warming spices like cumin, coriander, and caraway. The result is a thick, brick-red paste that’s equal parts spicy, savory, and aromatic. You can also find harissa as a dry spice blend that you mix with oil to form a paste.

It’s one of my favorite ingredients to amp up the flavor of your veggies (like in my Moroccan carrot salad) or meats (like my harrissa ribeye). You can also stir it into soups and stews, whisk it into sauces and dressings, or mix it with yogurt for an easy marinade. It gives dishes a slow-building heat that’s not blow-your-head-off spicy, but a warm, smoky kick that lingers. If you like spicy foods in general, I'm pretty sure you'll love it.

Why You’ll Love This Easy Veggie Side Dish

• Vibrant Twist On Tradition - While I’ll never be mad at a sweet potato casserole topped with a brown sugar-nut crumble or melty marshmallows, classic turkey dinner is usually a bit heavy for my taste. Swapping in this spicy-sweet alternative not only brightens the whole plate, but also cuts back on excess fat and calories. 
• Simple Ingredients - You only need 7 basic ingredients to make this holiday-ready side, including oil, salt and pepper. But, don’t let its simplicity fool you! Maple harissa sweet potato tian packs a big, flavorful punch that’ll be the talk of the dinner table.
• Perfectly Pretty - Shingling the sweet potatoes is an easy thing to do, but the visual impact is huge! If you’re looking to impress your guests, give tian-style veggies a try.

Ingredients & Substitutions

As promised, you only need a handful of ingredients to make this harissa maple sweet potato tian:

• Sweet Potatoes - If possible, look for tubers that are roughly the same width to make your shingles equally sized.
• Maple Syrup - Any grade of maple syrup will be good in this recipe, but please be sure to use real, pure, 100% maple syrup. Beware of “pancake syrup,” which is often just artificially dyed and flavored corn syrup.
• Harissa Paste - Amazon sells Harissa paste, as does Trader Joe's and Aldi. That said, you can absolutely make your own harissa if you prefer! I like this recipe.
• Dukkah - Optional, but delightful. Dukkah is an Egyptian seasoning blend made from toasted nuts, seeds, and spices that are crushed into a coarse, flavorful mix. It adds instant crunch and warmth to whatever it touches!
• Olive Oil, Kosher Salt & Black Pepper - Just the basics. Make sure to use freshly cracked pepper for the boldest flavor.

How to Make Maple Harissa Sweet Potato Tian

While this spicy shingled sweet potato casserole looks super impressive, it is actually quite easy to make. Here’s how it’s done:

Step 1: Prep Sweet Potatoes. Scrub your sweet potatoes clean and remove their skins. Cut your sweet potato into thin slices by halving each potato vertically, and then making ⅛" slices horizontally. You can achieve this either by using a mandoline (my preferred method for uniform slices) or using a sharp chef's knife.

Step 2: Whisk Sauce Ingredients. Make the roasting sauce by whisking together your maple syrup, olive oil and harissa in a large bowl.

Step 3: Toss your sweet potato slices in the harissa mixture with salt and pepper and coat evenly. I like to put some sauce on the bottom of the pan I'm tossing them in, and then more on top for an even distribution. Be sure to reserve about ¼ cup of the sauce for basting the tian as it bakes.

Step 4: Assemble. Using an oblong roasting dish, arrange the slices of sweet potatoes by layering them atop one another and snaking around the outside of the dish. Continue layering and working your way to the center in concentric circles, until the roasting dish is filled.

Step 5: Bake at 400ºF for about an hour, stopping every 15 minutes to brush more of the harissa maple sauce on top.

Step 6: Garnish & Serve. Sprinkle with dukkah and serve warm. Enjoy!

Optional Variations & Dietary Adaptations

• Spicier - Add an extra teaspoon of harissa or whisk in a pinch of cayenne or crushed red pepper flakes to boost the heat. You can also swirl in a spoonful of smoky chipotle in adobo for a deeper, earthier kick.
• Milder - Use half the amount of harissa or swap in a mild chili paste like Calabrian chili spread or even smoked paprika mixed with a little olive oil. This keeps the flavor without overwhelming sensitive palates.
• Nut-Free - Simply omit the dukkah or make a nut-free version using toasted seeds (sesame seeds, sunflower seeds, pepitas) and spices.
• Multi-Colored - Use half orange sweet potatoes and half purple sweet potatoes for a cool, colorful twist.
• Mix-Ins - I kept the ingredients pretty simple since harissa has such a bold flavor, but you’re welcome to shake things up. Try adding a tablespoon or two of chopped fresh herbs like rosemary or thyme for a hint of traditional holiday flavor. Or, add orange zest to the glazing sauce for a citrusy lift. For an extra savory hit, mash in a head of roasted garlic cloves. Want to tone down the heat? Make a creamy version with a drizzle of full-fat coconut milk.

Expert Tips 

• Slice the sweet potatoes evenly. Uniform slices ensure even cooking and a prettier, more cohesive “shingled” pattern. A mandoline (or “benny,” for all my fellow restaurant vets) makes quick work of this, but a sharp chef’s knife works just as well. Just take your time and protect your fingers! You can also use a food processor with the slicing blade.
• Cover if needed. If you are slicing the sweet potatoes by hand and they’re a bit thick, they may need some help softening. Spend the first 30 minutes of the baking period with the top covered in foil to help them steam, then uncover for the last part to get a crispy, caramelized top.
• Fan the slices tightly. Nestling the sweet potatoes closely together keeps them upright and helps them steam and roast simultaneously, giving you tender centers and beautifully caramelized edges.
• Use high-quality harissa. Harissa varies widely in spice level and flavor; taste yours first. Some are mild and smoky, others are fiery. Adjust the amount based on the brand you’re using and your heat preference.
• Don’t skimp on the seasoning. Sweet potatoes can handle a surprising amount of salt and spice. I recommend getting your hands in the bowl and rubbing the pieces to make sure each layer gets a little harissa-maple mixture on it.
• Let it rest before serving. A 10-15 minute rest after baking helps the layers settle and makes the tian easier to slice and serve.
• Finish with crunch. Dukkah sprinkled over the top just before serving adds texture and contrast.

Serving Suggestions

This harissa maple sweet potato tian is more versatile than you might think. It's a lovely modern alternative to traditional sweet potato casseroles on your holiday table. The sweet-spicy glaze and caramelized edges make it a natural fit for richer proteins like my Dutch oven turkey breast, smoked leg of lamb, crispy chicken paillards, or roasted pork tenderloin.

For a vegetarian-friendly spread, serve the tian alongside my Mediterranean baked feta with chickpeas and tomatoes, cauliflower steaks, or roasted tofu. You can also make it the star of your dinner plate by serving it with a dollop of labna or Greek yogurt with a soft-boiled jalapeño pickled egg, an herby side salad, and an extra shake of dukkah.

As leftovers, it absolutely shines: tuck slices into grain bowls, mash a few pieces into quesadillas or low-carb egg white wraps for a sweet-spicy twist, or reheat and top with a fried egg and a sprinkle of feta or goat cheese. Delightful!

Storage Instructions

• Fridge: Store leftover tian in an airtight container and refrigerate for up to 5 days. The flavors actually deepen as it sits, making it even better the next day.
• Reheating: Warm individual portions in the microwave or reheat the whole dish in a 350ºF oven for 10-15 minutes, until the sweet potatoes are heated through and the edges caramelize again.
• Freezer: You can freeze it for up to 2 months, but the texture of sweet potatoes becomes softer and slightly watery after thawing. Thaw in the fridge overnight before reheating and bake with the lid off to help evaporate any excess moisture. Add extra dukkah before serving for crunch.
• Make-Ahead Tip: Assemble the tian up to 3 days in advance, cover tightly, and refrigerate. Bake just before serving, adding a few extra minutes to the cook time if it’s going into the oven chilled.

More Non-Traditional Holiday Recipes

If you tried this recipe and loved it, be sure to rate and review it below! For more inexpensive and delicious recipe inspiration, be sure to follow me on Pinterest. You can also get all of my newest content delivered straight to your inbox by signing up for my email newsletter!