Easy & Irresistible Alton Brown Tomato Tart Recipe for All - Worth Pinning

Ingredients

• 3 cups cherry tomatoes (yellow or red), washed and dried
• 2 whole large onions, halved and sliced thin
• 1 ½ cups grated fontina cheese (or Monterey Jack)
• ¼ cup grated parmesan
• ¼ cup grated gruyère (or swiss)
• 2 whole store-bought pie crusts (or 1 good-sized homemade crust)
• 1 whole egg
• ¼ cup milk
• 4 tablespoons butter
• 16 whole basil leaves, chiffonade
• Salt and pepper, to taste