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Caramelized Onion and Tomato Tart Au Gratin

Can't Stay Out of the Kitchen

 

This amazing vegetable pie has spectacular flavors using four different cheeses, tomatoes and caramelized onions. A fabulous Meatless Mondays recipe.

Ingredients

  • 1 whopper-sized onion, sliced and separated into rings (about 1-lb. or two large onions)
  • 2 tbsp. olive oil
  • 3 tbsp. white wine vinegar
  • 1/2 tsp. thyme
  • 1/2 tsp. kosher salt
  • 1/4 tsp. pepper
  • 3 large tomatoes (sliced)
  • 1/2 cup shredded parmesan cheese
  • 1/2 cup shredded Asiago cheese
  • 1/2 cup shredded fontina cheese
  • 1/4 to 1/2 cup finely grated pecorino romano cheese
  • 1/2 tsp. basil
  • 1/2 tsp. oregano
  • 1/2 tsp. rosemary (crushed)
  • 1/2 tsp. rubbed sage leaves
  • recipe for single crust plain pastry

Directions

  1. Slice tomatoes and lay out on paper towels. Sprinkle very generously with salt and allow to set out on counter and drain for at least one...
  2. Get the full instructions at Can't Stay Out of the Kitchen
Caramelized Onion and Tomato Tart Au Gratin

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Unrated
Author:
Teresa
Cuisine:
American
Category:
Vegetable Pie
Recipe Yields:
8
Prep Time:
Cook Time: