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Rustic Vidalia Onion Tart With Thyme

Prep time 15 mins
Cook time 8 mins
Bake time 17 mins
Stand time 5 mins
Yield Makes 6 servings
Don't worry about being exact when folding the piecrust. It's meant to look organic and free-form, allowing the filling to show through.

Ingredients

  • 2 tablespoons butter
  • 4 medium-size Vidalia onions, thinly sliced (about 6 1/2 cups)
  • 1 1/2 teaspoons chopped fresh thyme
  • 3/4 teaspoon salt
  • 1/2 teaspoon pepper
  • 1/2 (15-oz.) package refrigerated piecrusts
  • Parchment paper
  • 1 egg white, lightly beaten
  • 3/4 cup (3 oz.) shredded Gruyère cheese

How to Make It

  1. Preheat oven to 425°. Melt butter in a large nonstick skillet over medium-high heat; add onion and next 3 ingredients. Cook, stirring occasionally, 8 minutes or until tender.

  2. Unroll piecrust onto a lightly floured surface. Pat or roll into a 12-inch circle. Place piecrust on a parchment paper-lined baking sheet. Brush with egg white. Sprinkle 1/2 cup cheese in center of crust. Spoon onion mixture over cheese, leaving a 2 1/2-inch border. Sprinkle remaining 1/4 cup cheese over onion. Fold piecrust border up and over onion, pleating as you go and leaving a 4-inch-wide opening in center. Brush crust with egg white.

  3. Bake at 425° on bottom oven rack 17 to 19 minutes or until crust is golden. Let stand 5 minutes before serving.