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Caramelized Onion and Goat Cheese Tarts

Flaky puff pastry topped with slow-cooked sweet balsamic caramelized onions and tangy crumbled goat cheese.
Print Recipe
Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 6 tarts
Course: Appetizer, Lunch
Cuisine: European, French
Calories: 310
Ingredients Equipment Method Notes

Ingredients
  

Pastry Base
  • 1 sheet puff pastry thawed
  • 1 large egg for egg wash
  • 1 tbsp water for egg wash
Onion Filling
  • 3 large yellow onions thinly sliced
  • 2 tbsp unsalted butter
  • 1 tbsp olive oil
  • 1 tbsp balsamic vinegar
  • 1 tsp brown sugar optional
  • 1 tsp fresh thyme leaves
  • 0.5 tsp salt to taste
Topping
  • 4 oz goat cheese crumbled
  • 1 tsp fresh thyme for garnish

Equipment

  • Large Skillet
  • Baking sheet
  • Parchment paper
  • Chef's Knife

Method
 

  1. Melt butter and olive oil in a large skillet over medium heat. Add sliced onions and toss to coat.
  2. Reduce heat to medium-low and cook onions for 30-40 minutes, stirring occasionally, until deep golden brown and soft.
  3. Stir in brown sugar, thyme, salt, and balsamic vinegar. Cook for 2 more minutes until sticky. Remove from heat and cool.
  4. Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
  5. Unroll puff pastry and cut into 6 squares (or leave whole). Score a border 1/2 inch from the edge with a knife.
  6. Spread cooled onions inside the border. Top with crumbled goat cheese.
  7. Brush the pastry borders with egg wash (egg beaten with water).
  8. Bake for 18-22 minutes until pastry is puffed and golden brown.
  9. Garnish with extra fresh thyme and serve warm.

Notes

Ensure the onions are fully cooled before placing on the pastry to prevent a soggy bottom.