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–+ servings
A puff pastry crust with sliced onions cut into squares.

Classic French Onion Tart

Most delicious and easy appetizer, this Classic French Onion Tart is so perfect for spring entertaining! Made with only four ingredients and quick to make, you will love throwing this savory tart together for all of you gatherings.
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Course: Appetizer, Side Dish, Snacks
Cuisine: French
Prep Time: 10 minutes
Cook Time: 45 minutes
Total Time: 55 minutes
Servings: 15 servings
Calories: 121kcal
Author: Kristen Massad

Ingredients

  • 1 Sheet Frozen Puff Pastry
  • ½ Cup Shredded Gruyere Cheese
  • 1 Teaspoon Fresh Thyme Leaves
  • 3 Sweet Yellow Onions sliced thin

Egg Wash

  • 1 Egg
  • 1 Tablespoon Water

Instructions

  • Preheat oven to 375 degrees F and line a half sheet baking sheet with parchment paper
  • Take one frozen puff pastry sheet out of the freezer and allow it to come to room temperature for 10 minutes or until soft enough to unroll
  • Place the puff pastry on the lined baking sheet and sprinkle with gruyere cheese and thyme leaves leaving ½ inch board on the puff pastry
  • Layer the sliced onions (slightly overlapping) over the cheese
  • Using a pasty brush, egg wash the boarder of the puff pastry, fold over the edges and press down using a fork
  • Bake the French Onion Tart for 45-50 minutes or until the puff pastry is golden brown and the onions are cooked through
  • Remove the tart from the oven and serve warm!

Egg Wash

  • Whisk together the egg and water; set aside

Nutrition

Serving: 1serving | Calories: 121kcal | Carbohydrates: 9g | Protein: 3g | Fat: 8g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 16mg | Sodium: 77mg | Potassium: 51mg | Fiber: 1g | Sugar: 1g | Vitamin A: 64IU | Vitamin C: 2mg | Calcium: 53mg | Iron: 1mg
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