Caramelized Onion and Gruyère Tart with Arugula
A French-inspired tart with sweet caramelized onions, creamy Gruyère cheese, and peppery arugula for a refined, elegant dish. This french-inspired pasta ready in about 50 minutes layers sheet (14 oz) puff pastry, large, thinly sliced onions, butter into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 360 calories and feeds 6, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1 sheet (14 oz) puff pastry
- 2 large, thinly sliced onions
- 2 tbsp butter
- 1 tbsp sugar
- 1 cup, grated Gruyère cheese
- 4 oz, washed arugula
- 1/2 tsp salt
- 1/4 tsp pepper
- 1 tbsp Dijon mustard
Instructions
- Step 1: Preheat oven to 400°F. Roll out pastry on a floured surface, then transfer to a baking sheet. Trim edges and prick with a fork.
- Step 2: In a skillet, cook onions with butter and sugar over low heat for 20-25 minutes until golden and caramelized. Mix in Gruyère, 1/4 tsp salt, and 1/8 tsp pepper.
- Step 3: Spread onion mixture over pastry, leaving a 1-inch border. Fold edges into a rim, then brush with Dijon mustard. Bake for 20-25 minutes until golden and bubbly.
- Step 4: Let cool 5 minutes, then top with arugula and a drizzle of olive oil before serving.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Caramelized Onion and Gruyère Tart with Arugula take to make?
Total time is about 50 minutes (20 min prep + 30 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.
How do I store leftover Caramelized Onion and Gruyère Tart with Arugula?
Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.
Can I substitute ingredients in Caramelized Onion and Gruyère Tart with Arugula?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Caramelized Onion and Gruyère Tart with Arugula for a different number of people?
The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
What goes well with Caramelized Onion and Gruyère Tart with Arugula?
French pasta like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
