Caramelized Onion Tart

Don’t have a tart pan? We also baked this on a baking sheet with fantastic results. See instructions below.
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Ingredients

Makes 6 servings / Prep: 15 min., Bake: 30 min.

  • Caramelized Sweet Onions
  • 1 tablespoon Dijon mustard
  • teaspoons chopped fresh rosemary
  • ¼ teaspoon pepper
  • ½ 17.3-ounce package frozen puff pastry sheets, thawed
  • ½ cup shredded Parmesan cheese

Garnish:

  • fresh rosemary sprigs

Instructions

  • Stir together first 4 ingredients; set mixture aside.
  • Unfold pastry sheet; roll into a 10-inch square.
  • Fit pastry sheet into a 9-inch square metal tart pan, gently pressing onto bottom and up sides.
  • Bake, on bottom oven rack, at 400° for 20 to 25 minutes or until browned.
  • Remove from oven.
  • Press pastry with back of a spoon to flatten.
  • Spoon onion mixture onto pastry; sprinkle with Parmesan.
  • Bake 5 more minutes.
  • Garnish, if desired, and serve immediately.

Notes / Tips / Wine Advice:

If you don’t have a tart pan, unfold pastry sheet onto a lightly greased baking sheet. Bake, on bottom rack, at 400° for 16 to 18 minutes or until puffed and golden. Using a serrated knife, cut a slit around top of pastry, leaving a ½-inch border on all sides. (Do not cut through or to bottom.) Press cut square center to flatten. Spoon onion mixture onto pastry; sprinkle with Parmesan cheese, and bake 5 more minutes.
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Course Quiche / Tarts
Diets Vegetarian