Sweet Potato, Feta & Caramelised Onion Tart
Okay, friend if you’re in the mood for something savory, cozy, and seriously satisfying, let me introduce you to this Sweet Potato, Feta & Caramelised Onion Tart. It’s everything you want in a comforting bake: buttery pastry, tender roasted sweet potatoes, rich and melty feta cheese, and sweet caramelized onions that taste like they’ve been kissed by sunshine.
This tart is the kind of dish that looks fancy but feels like a warm hug. Serve it at brunch, bring it to a potluck, or just treat yourself to a slice on a lazy evening it’s got all the vibes of comfort and elegance wrapped in one flaky, golden crust.
Why You’ll Love Sweet Potato, Feta & Caramelised Onion Tart
This recipe isn’t just about the ingredients it’s about creating moments. Whether you’re cooking for a casual family dinner, hosting a get-together with friends, or simply indulging in some comforting flavors for yourself, this dish is versatile enough to fit the occasion. Here’s why it’s a favorite:
Versatile: Perfect for brunch, lunch, dinner, or even as an appetizer. It works hot, cold, or somewhere in between.
Budget-Friendly: Uses affordable pantry and fridge staples that go a long way in flavor.
Quick and Easy: Minimal prep, and most of the work is done in the oven while you sip your tea.
Customizable: Want to add spinach, sundried tomatoes, or olives? Go for it. This tart welcomes creativity.
Crowd-Pleasing: A guaranteed hit with both kids and adults. It’s always a win when a single dish can satisfy everyone at the table. This recipe strikes the perfect balance of flavor and comfort, making it a universal favorite.
Ingredients
Ingredients in Sweet Potato, Feta & Caramelised Onion Tart
Every layer in this tart brings something unique and tasty to the table. Here’s what you’re working with:
Sweet Potatoes: Naturally sweet and velvety when roasted, they create a hearty base for the tart.
Feta Cheese: Salty, creamy, and a little tangy it melts just enough to blend into the filling while still holding its character.
Caramelised Onions: Slow-cooked until golden and jammy, these bring a subtle sweetness that makes the dish sing.
Puff Pastry or Shortcrust Pastry: Flaky, golden, and buttery the perfect vessel to hold all that goodness.
Olive Oil or Butter: Used to soften the onions and help everything cook down beautifully.
Eggs: Helps bind the filling and adds a lovely richness.
Cream or Milk: Adds silkiness to the tart’s filling and keeps everything nice and tender.
Thyme or Rosemary (optional): For a fragrant herbal note that complements the sweet and salty flavors perfectly.
Salt & Pepper: To season and balance the dish just right.
(Note: the full ingredients list, including measurements, is provided in the recipe card directly below.)

Instructions
Preheat Your Equipment
Start by preheating your oven to 375°F (190°C). Line your tart pan or baking tray with parchment paper or lightly grease it to prevent sticking.
Combine Ingredients
Slice the onions thinly and cook them low and slow in a skillet with olive oil or butter until deeply golden—about 20–25 minutes. Stir occasionally and add a pinch of salt to help them soften. While the onions are caramelizing, roast cubed sweet potatoes in the oven until fork-tender and lightly golden.
Prepare Your Cooking Vessel
Roll out your pastry and gently press it into your tart pan. Use a fork to poke small holes in the base to prevent bubbling. You can blind-bake it for 10 minutes if you like a crispier crust.
Assemble the Dish
Spread a thin layer of caramelized onion over the base of the tart. Top with roasted sweet potato chunks and sprinkle with crumbled feta. Whisk eggs and cream together with seasoning and herbs, then pour over the tart filling.
Cook to Perfection
Bake in the oven for 30–35 minutes, or until the filling is set and the pastry is beautifully golden. The top should look slightly puffed and golden around the edges.
Finishing Touches
Let the tart cool for 10 minutes before slicing. This helps everything set up perfectly and makes it easier to serve.
Serve and Enjoy
Slice into wedges and serve warm or at room temp. This tart holds up like a champ, whether you’re having it fresh or saving leftovers for lunch.
Nutrition Facts:
Servings: 6
Calories per serving: ~420
(Note: these values are approximate and may vary depending on crust choice.)
Preparation Time
Prep Time: 20 minutes
Cook Time: 35 minutes
Total Time: 55 minutes
How to Serve Sweet Potato, Feta & Caramelised Onion Tart
This dish pairs wonderfully with various sides and accompaniments. Here are a few serving suggestions to enhance your dining experience:
- A crisp green salad with lemon vinaigrette balances the richness beautifully
- Serve with a bowl of tomato soup for a cozy lunch or dinner
- Top with a drizzle of balsamic glaze for extra sweetness
- Enjoy with a side of sautéed greens or roasted veggies
- For brunch, pair it with fresh fruit and a mimosa—yes, please
Additional Tips
Here are some extra tips to help you get the most out of this recipe:
- Use store-bought pastry to save time, or make your own if you’re feeling ambitious
- Don’t rush the onions they’re worth every minute of slow caramelization
- Add chili flakes or a pinch of nutmeg for a different flavor twist
- If using frozen pastry, let it thaw fully before unrolling to avoid cracks
- Swap in goat cheese for a tangier, creamier variation
- Make mini tartlets in a muffin pan for parties or appetizers
- Keep leftovers refrigerated and reheat in the oven to keep the crust crisp
- This tart is great for meal prep perfect for next-day lunches
- Try adding spinach, kale, or even cooked lentils for added nutrients
- Brush the crust edges with egg wash for that extra golden touch
FAQ’s
1. Can I use a different cheese instead of feta?
Yes! Goat cheese, ricotta, or even mozzarella work well depending on the flavor you’re after.
2. Can I make this tart ahead of time?
Absolutely. Make and bake it in advance, then reheat in the oven before serving.
3. Can I freeze this tart?
Yes bake it, cool it, then wrap it tightly and freeze. Reheat from frozen in the oven.
4. Can I make this tart gluten-free?
Use a gluten-free pastry crust and ensure your other ingredients are gluten-free too.
5. What if I don’t have a tart pan?
A regular pie dish or even a baking sheet with edges works just fine.
6. Can I use red onions instead of yellow?
Definitely they’ll add a deeper color and slightly different sweetness.
7. Is it okay to skip the blind baking step?
Yes, though blind baking gives a crisper crust it’s optional based on your texture preference.
8. Can I use canned sweet potatoes?
It’s better to use fresh for texture, but in a pinch, canned can work if drained well.
9. How long will leftovers keep?
Stored in the fridge, they’ll last up to 4 days—just reheat in the oven.
10. Can I make this tart without eggs?
Try a mix of dairy-free cream and cornstarch or a plant-based egg substitute for a vegan-friendly version.
Conclusion
This Sweet Potato, Feta & Caramelised Onion Tart is what happens when comfort food meets gourmet flavor without the fuss. It’s elegant yet easy, hearty but light, and totally packed with delicious layers that come together in every bite. Whether you’re serving it up for a cozy dinner or adding it to your weekend brunch rotation, this tart is guaranteed to impress. So grab your rolling pin and let’s bake some magic.
Print
Sweet Potato, Feta & Caramelised Onion Tart
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 4 servings 1x
- Category: Main Dish
- Method: Baked
- Cuisine: Vegetarian / European
- Diet: Vegetarian
Description
This Sweet Potato, Feta & Caramelised Onion Tart is a savory, comforting dish featuring tender roasted sweet potatoes, tangy feta cheese, and sweet caramelised onions on a flaky pastry base. It’s perfect for brunch, lunch, or a light dinner.
Ingredients
- 1 sheet puff pastry (thawed if frozen)
- 1 medium sweet potato, peeled and thinly sliced
- 2 tbsp olive oil, divided
- 1 large onion, thinly sliced
- 1 tsp balsamic vinegar
- 3.5 oz (100g) feta cheese, crumbled
- 1 tsp fresh thyme leaves (or 1/2 tsp dried)
- Salt and pepper to taste
- 1 egg, beaten (for egg wash – optional)
Instructions
- Preheat oven to 400°F (200°C). Line a baking tray with parchment paper.
- Heat 1 tbsp olive oil in a pan over medium heat. Add sliced onions and cook slowly, stirring occasionally, for about 15–20 minutes until deeply golden. Add balsamic vinegar in the last 2 minutes. Set aside.
- Toss sweet potato slices with 1 tbsp olive oil, salt, and pepper.
- Place puff pastry sheet on the prepared tray. Lightly score a border about 1/2 inch from the edge. Prick the center with a fork.
- Spread caramelised onions evenly over the pastry base (inside the border). Layer sweet potato slices over the onions. Top with crumbled feta and sprinkle with thyme.
- Brush the edges of the pastry with beaten egg for a golden finish (optional).
- Bake for 25–30 minutes until pastry is golden and crisp, and sweet potatoes are tender.
- Let cool slightly before slicing. Serve warm or at room temperature.
Notes
- Use goat cheese or ricotta as a substitute for feta if desired.
- Pairs well with a simple green salad.
- Can be made ahead and reheated in the oven.
Nutrition
- Serving Size: 1/4 tart
- Calories: 370
- Sugar: 6g
- Sodium: 420mg
- Fat: 24g
- Saturated Fat: 9g
- Unsaturated Fat: 13g
- Trans Fat: 0g
- Carbohydrates: 31g
- Fiber: 3g
- Protein: 7g
- Cholesterol: 40mg
Keywords: sweet potato tart, caramelised onion tart, feta tart, puff pastry tart, vegetarian savory tart