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Cheesy Onion Tart
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Irresistibly Cheesy Onion Tart: A Flavorful Home Indulgence

This Cheesy Onion Tart is a comforting dish combining caramelized onions and gooey cheese, perfect for any occasion.
Course Lunch
Cuisine French
Keyword Cheesy Onion Tart, comfort food, easy recipe, Onion Tart, Puff Pastry Tart, Savory Tart
Prep Time 20 minutes
Cook Time 30 minutes
Cooling Time 10 minutes
Total Time 1 hour
Servings 8 slices
Calories 250kcal

Equipment

  • Oven
  • Skillet
  • Tart pan
  • Pastry brush

Ingredients

For the Tart

  • 1 sheet Puff Pastry thawed frozen
  • 2 medium Onions yellow or sweet
  • 2 tablespoons Olive Oil
  • 2 tablespoons Butter
  • to taste Salt
  • to taste Pepper
  • 1 teaspoon Fresh Thyme optional
  • 1 cup Grated Cheese Gruyère or Cheddar
  • 1 large Egg for egg wash

Instructions

How to Make Cheesy Onion Tart

  • Preheat your oven to 375°F (190°C).
  • Heat olive oil and butter in a large skillet over medium heat.
  • Add sliced onions to the skillet and cook until caramelized for about 25-30 minutes.
  • Roll out the puff pastry on a floured surface and fit it into a tart pan.
  • Spread the caramelized onions evenly over the pastry.
  • Top the onions with grated cheese, sprinkling it generously.
  • Fold the pastry edges over the filling to create a decorative border.
  • Brush the folds with beaten egg using a pastry brush.
  • Bake the tart for 25-30 minutes until golden brown.
  • Cool slightly before serving.

Notes

Garnish with fresh thyme leaves for an aromatic touch. Store leftovers in an airtight container for up to 3 days.