Pissaladiere Ii

Ingredients

• pastry dough, for one 9-inch pie
• 2 tablespoons olive oil
• 2 cups onions, chopped
• 1 garlic clove, minced
• 1/4 teaspoon salt
• 3 tablespoons fresh basil, chopped (1 Tbsp dried)
• 4 eggs, lightly beaten
• 1 cup milk
• 1/4 teaspoon dry mustard
• 1 tablespoon white flour
• 1/3 cup parmesan cheese, grated
• 3/4 cup mozzarella cheese, grated (4 ounces)
• 1/3 cup black olives, sliced
• 1 medium tomatoes, thinly sliced