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Sweet Onion and Parmesan Puff Pastry Tart Recipe

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  • Author: Lily
  • Prep Time: 10 minutes
  • Cook Time: 35 minutes
  • Total Time: 45 minutes
  • Yield: 1 tart (serves 4 as appetizer pieces)
  • Category: Appetizer
  • Method: Baking
  • Cuisine: American

Description

This Onion Tart is a flavorful American appetizer featuring a flaky puff pastry base topped with sweet sautéed onions, creamy Greek yogurt, and freshly grated Parmesan cheese, finished with aromatic fresh thyme. Easy to prepare and perfect for serving warm as a starter or light snack.

Ingredients

Vegetables

  • 1 sweet onion

Pastry Base

  • 1 sheet puff pastry (or ½ batch easy puff pastry)

Dairy

  • ¼ cup Greek yogurt (plain)
  • 2 tablespoons Parmesan (freshly grated)
  • 1 egg

Seasonings & Herbs

  • 1 tablespoon olive oil
  • 1 teaspoon fresh thyme
  • Salt
  • Pepper
  • 1 tablespoon water

Instructions

  1. Preheat Oven: Begin by preheating your oven to 400°F (200°C) to ensure it reaches the perfect temperature for baking your tart.
  2. Sauté Onions: Heat a bit of olive oil in a hot pan over medium heat. Add the peeled and sliced sweet onion and sauté until soft and slightly translucent. Once cooked, remove from heat and let the onions cool slightly.
  3. Prepare Puff Pastry: Roll out the puff pastry into a 10×10 inch square. If using store-bought pastry which comes in a rectangle, no additional rolling is necessary. Trim about ¼ to ½ inch off each side of the pastry square and save these trimmed pieces for the tart border.
  4. Set Pastry on Baking Sheet: Place the main puff pastry square on a baking sheet lined with parchment paper for easy cleanup.
  5. Make Egg Wash: In a small bowl, whisk together the egg and water to create an egg wash. Brush a thin strip of the egg wash along the perimeter edge of the puff pastry square.
  6. Form Tart Border: Use the trimmed pastry pieces to form a raised border around the tart, placing them on top of the egg-washed perimeter to help them stick and create a crust edge.
  7. Assemble Tart Filling: Evenly spread the plain Greek yogurt over the inside center of the puff pastry, inside the bordered edges. Layer the sautéed onions on top of the yogurt.
  8. Add Cheese and Herbs: Sprinkle the freshly grated Parmesan cheese over the onions. Follow with a sprinkle of fresh thyme, salt, and pepper to season the filling.
  9. Glaze Pastry: Brush the top of the pastry and border with the remaining egg wash to promote a beautiful golden color during baking.
  10. Bake: Place the tart into the preheated oven and bake for 20-25 minutes or until the pastry is puffed, golden, and fully cooked.
  11. Cool and Serve: After baking, allow the tart to cool for at least 10 minutes on a wire rack before slicing. This helps the filling set and makes serving easier.

Notes

  • You can substitute the sweet onion with yellow or Vidalia onions for a slightly different flavor profile.
  • If you prefer a crispier tart, bake for a few extra minutes but watch carefully to avoid burning.
  • For a richer tart, consider adding a sprinkle of Gruyère cheese along with Parmesan.
  • This tart is best served warm but can be enjoyed at room temperature.
  • Puff pastry can be homemade or store-bought depending on your time and preference.

Find it online: https://dishmelt.com/sweet-onion-and-parmesan-puff-pastry-tart-recipe/