Tomato Tart | Recipe Cloud App

Ingredients

• 4 Tbsp. butter
• 2 whole large onions, halved and sliced thin
• Salt and pepper, to taste
• 2 whole store-bought pie crusts (or 1 good sized homemade crust)
• 1 1/2 cups grated fontina cheese (or monterey jack)
• 1/4 cup grated parmesan
• 1/4 cup grated gruyère (or swiss)
• 3 cups cherry tomatoes (yellow or red), washed and dried (plus more if needed)
• 1 whole egg
• 1/4 cup milk
• 16 whole basil leaves, chiffonade (more if needed)