Au Bon Pain-Inspired Rustic Tomato and Gruyère Tart
A flaky tart filled with roasted tomatoes, caramelized onions, and melted Gruyère cheese, evoking the cozy flavors of a French café. This french-inspired breakfast ready in about 55 minutes layers halved cherry tomatoes, medium, thinly sliced yellow onion, olive oil 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 320 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 (about 9x12 inches), thawed store-bought puff pastry
- 2 cups, halved cherry tomatoes
- 1 medium, thinly sliced yellow onion
- 3 tbsp olive oil
- 1 tbsp, fresh thyme leaves
- 1 cup shredded Gruyère cheese
- 1 tsp salt
- 1/2 tsp black pepper
- 1, beaten for egg wash egg
Instructions
- Step 1: Preheat oven to 400°F (200°C). Toss 2 cups halved cherry tomatoes with 1 tbsp olive oil, 1 tsp salt, 1/2 tsp black pepper, and 1 tbsp fresh thyme leaves. Spread on a baking sheet and roast for 20 minutes until tomatoes soften and caramelize.
- Step 2: While tomatoes roast, heat 2 tbsp olive oil in a skillet over medium heat. Add 1 thinly sliced medium yellow onion and cook for 15 minutes, stirring occasionally, until golden and caramelized. Remove from heat.
- Step 3: Roll out 1 sheet thawed puff pastry on a parchment-lined baking sheet. Score a 1-inch border around the edges without cutting through.
- Step 4: Spread the caramelized onions evenly inside the border, then scatter the roasted tomatoes over the onions. Sprinkle 1 cup shredded Gruyère cheese evenly on top.
- Step 5: Brush the pastry border with 1 beaten egg for a golden finish. Bake in the preheated oven for 25-30 minutes until pastry is puffed and golden and cheese is melted and bubbly. Cool slightly before slicing and serving.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Au Bon Pain-Inspired Rustic Tomato and Gruyère Tart take to make?
Total time is about 55 minutes (15 min prep + 40 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 Au Bon Pain-Inspired Rustic Tomato and Gruyère Tart?
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 Au Bon Pain-Inspired Rustic Tomato and Gruyère Tart?
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 Au Bon Pain-Inspired Rustic Tomato and Gruyère Tart 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 Au Bon Pain-Inspired Rustic Tomato and Gruyère Tart?
French breakfast 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.
