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Warm Onion Tart with Thyme

A delicate appetizer featuring caramelized Spanish onions and fresh thyme atop crispy golden puff pastry rounds. These elegant mini tarts combine buttery pastry with sweet, tender onions enhanced by aromatic thyme.

6 servings
1 hr 15 min
Published October 4, 2025

Ingredients

  • •1 whole Spanish onion
  • •1 tablespoon unsalted butter
  • •1 tablespoon fresh thyme leaves
  • •1 to taste Salt and freshly ground black pepper
  • •1 sheet sheet frozen puff pastry
  • •thawed according to package directions

Cooking Instructions

  1. 1.

    Peel and cut the onion in half through the root. Trim the ends and then julienne the onion lengthwise.

    5 min

  2. 2.

    Melt the butter in a small sauté pan over medium heat. Add the onion and thyme and cook, stirring occasionally, for 10 to 15minutes or until the onion is a deep golden brown. Season to taste with salt and pepper. Keep warm until ready to serve.

    15 min

  3. 3.

    Meanwhile, preheat the oven to 400°F.

    10 min

  4. 4.

    Peel and cut the onion in half through the root. Trim the ends and then julienne the onion lengthwise.

    5 min

  5. 5.

    Melt the butter in a small sauté pan over medium heat. Add the onion and thyme and cook, stirring occasionally, for 10 to 15minutes or until the onion is a deep golden brown. Season to taste with salt and pepper. Keep warm until ready to serve.

    15 min

  6. 6.

    Meanwhile, preheat the oven to 400°F.

    10 min

  7. 7.

    Unfold the puff pastry sheet on a lightly floured work surface and turn over to prevent the creases from splitting. Pat down gently to flatten the sheet.

    5 min

  8. 8.

    Using a 1-inch round fluted cookie cutter, stamp out 6 rounds and transfer to an ungreased baking sheet. Bake for 8 to 10minutes or until puffed and golden brown.

    10 min

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