Description
This caramelized onion tart features tender, sweet onions baked beneath golden puff pastry for a savory, elegant dish that’s simple to prepare and full of flavor. Perfect as an appetizer, light lunch, or stylish starter.
Ingredients
- 200 grams puff pastry, 1 sheet, thawed
- 4 medium red onions, sliced into ½-inch-thick rounds
- 1 tablespoon balsamic vinegar
- 1 tablespoon maple syrup
- 1 teaspoon salt
- 1 tablespoon olive oil (optional)
- Fresh thyme leaves, optional for garnish
Instructions
- Thaw puff pastry according to package instructions and keep chilled until ready to use.
- Peel and slice the onions into ½-inch-thick rounds.
- Heat a large pan over medium heat. Arrange onion slices evenly in the pan and cover with boiling water. Simmer on medium-low heat for about 20 minutes until water evaporates and onions are tender.
- Add balsamic vinegar, maple syrup, salt, and olive oil (if using). Cook for a few more minutes until lightly caramelized and golden. Remove from heat.
- Preheat oven to 400°F (200°C). Lightly grease an 8.5 x 10-inch tart or pie pan.
- Spread the caramelized onions evenly across the bottom of the pan.
- Lay the puff pastry over the onions, gently tucking the edges around them.
- Bake for 30 minutes or until pastry is puffed and deeply golden.
- Let tart cool for a few minutes, then carefully invert onto a serving plate or board.
- Garnish with fresh thyme if desired. Slice and serve warm.
Notes
- Use yellow or sweet onions for a milder flavor.
- Add other cooked vegetables like carrots or potatoes.
- Swap maple syrup with brown or coconut sugar.
- Use apple cider vinegar instead of balsamic for a lighter tang.
- Reheat in the oven to retain pastry crispness—avoid microwaving.
- Prep Time: 5 minutes
- Cook Time: 50 minutes
- Category: Appetizer
- Method: Baking
- Cuisine: French
Nutrition
- Serving Size: 1 slice (1/4 tart)
- Calories: 320
- Sugar: 8g
- Sodium: 460mg
- Fat: 20g
- Saturated Fat: 6g
- Unsaturated Fat: 13g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 3g
- Protein: 4g
- Cholesterol: 0mg
