Donna's Cheesy Quiche

INGREDIENTS

• 2 tablespoons olive oil
• 1 small onion, diced
• 3 eggs
• 1 cup heavy cream
• 1/2 teaspoon dried basil
• 1/2 teaspoon dried oregano
• 1 teaspoon salt
• 1/2 teaspoon ground black pepper
• 1 (9 inch) pie crust
• 3/4 cup mozzarella cheese, shredded
• 3/4 cup Cheddar cheese, shredded