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Caramelized Onion and Apple Puff Pastry Tart Recipe

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4 from 14 reviews

This Caramelized Onion and Apple Puff Pastry Tart is a delightful blend of sweet and savory flavors, combining crisp apple slices, flavorful onion jam, fresh thyme, and melted Gruyère cheese on a flaky puff pastry base. Perfect as an appetizer or light meal, this tart offers a beautiful balance of textures and tastes, baked to golden perfection and finished with a touch of flaky sea salt.

  • Total Time: 30 minutes
  • Yield: 6 servings

Ingredients

For the Tart

  • 3 tbsp onion jam
  • 1 tsp balsamic vinegar
  • 6 apple slices (from 1 crisp apple such as Honeycrisp or Pink Lady, thinly sliced into half moons)
  • 5-6 sprigs fresh thyme plus extra for garnish
  • ¾ cup Gruyère cheese, grated (or sharp white cheddar)
  • 1 sheet frozen puff pastry, thawed and sliced into 6 even rectangles
  • 1 egg, beaten (for egg wash)
  • ¼ tsp olive oil (for baking sheet)
  • Flaky sea salt to finish

Instructions

  1. Preheat Oven: Preheat your oven to 400ºF (200ºC) to ensure it reaches temperature for baking the pastry evenly and to a golden crisp.
  2. Prepare Onion Jam: Stir the onion jam with a splash of balsamic vinegar. This balances the sweetness of the jam, enhancing its flavor. Set this mixture aside.
  3. Assemble Tart Base: Line a baking sheet with parchment paper and lightly oil it with about ¼ teaspoon of olive oil to prevent sticking. On each puff pastry rectangle, place 6 layers consisting of thin apple slices, a few sprigs of fresh thyme, a thin smear of the prepared onion jam, and a generous sprinkle of grated Gruyère cheese.
  4. Seal Tart Edges: Lay the puff pastry over the layered ingredients and gently press down the edges with a fork to crimp and seal the filling inside.
  5. Apply Egg Wash and Season: Brush the tops of the pastries with the beaten egg wash to achieve a golden, glossy crust when baked. Sprinkle with flaky sea salt for a finishing touch and to enhance flavor.
  6. Bake the Tarts: Place the prepared baking sheet in the preheated oven and bake for 20 to 25 minutes, or until the puff pastry is puffed up and golden brown.
  7. Rest and Serve: Remove from oven and allow the pastries to rest for 2 to 3 minutes to set before carefully flipping them onto a serving dish. Garnish with additional fresh thyme and serve warm for the best taste experience.

Notes

  • Use a crisp apple variety like Honeycrisp or Pink Lady for the best texture and flavor contrast.
  • Gruyère cheese adds a nutty and creamy flavor but you can substitute with sharp white cheddar if preferred.
  • Ensure the puff pastry is thawed properly before assembly to prevent cracking.
  • The tart can be served warm or at room temperature and makes a great appetizer or light lunch option.
  • Use flaky sea salt as garnish to add a pleasant crunch and enhance the overall flavor profile.
  • Author: Ella
  • Prep Time: 10 minutes
  • Cook Time: 20 minutes
  • Category: Appetizer
  • Method: Baking
  • Cuisine: French-inspired
  • Diet: Vegetarian

Find it online: https://mydishspace.com/caramelized-onion-and-apple-puff-pastry-tart-recipe/