Tarte aux Moutarde
Tarte aux Moutarde is a delicious French savory tart featuring flaky puff pastry layered with Dijon mustard, fresh tomatoes, and melted cheese. The mustard provides a bold, tangy base that perfectly complements the sweetness of ripe tomatoes. Finished with herbs and baked until golden, the tart is crisp, flavorful, and beautifully balanced. It is ideal for brunch, lunch, appetizers, or light dinners. Easy to prepare yet elegant enough for entertaining, this traditional French recipe is a timeless favorite.
Ingredients
- 1 sheet puff pastry, thawed
- 3 tablespoons Dijon mustard
- 3 large ripe tomatoes, thinly sliced
- 1½ cups grated Gruyère, Comté, or Emmental cheese
- 1 tablespoon olive oil
- 1 teaspoon fresh thyme leaves
- Salt, to taste
- Freshly ground black pepper, to taste
- 1 egg, beaten (for egg wash)
Instructions
- Preheat the oven to 400°F (200°C). Line a baking tray or tart pan with parchment paper.
- Roll out the puff pastry and place it on the prepared pan. Score a 1-inch border around the edges without cutting through the pastry.
- Spread the Dijon mustard evenly inside the border.
- Sprinkle the grated cheese over the mustard.
- Arrange the tomato slices in overlapping layers over the cheese.
- Season with salt, black pepper, and fresh thyme. Drizzle lightly with olive oil.
- Brush the pastry edges with beaten egg.
- Bake for 30–35 minutes until the pastry is golden brown and crisp.
- Allow the tart to cool for 5 minutes before garnishing with fresh basil and serving.
Notes
- Use ripe but firm tomatoes to prevent excess moisture.
- Dijon mustard provides the authentic French flavor.
- Gruyère offers the richest, nutty taste.
- Puff pastry should remain cold before baking.
- Pat tomato slices dry with paper towels.
- Fresh thyme enhances the savory flavor.
- Serve warm or at room temperature.
- Pair with a crisp green salad for a complete meal.