Easy Mac and Cheese Muffins

INGREDIENTS

• 2 cups uncooked elbow macaroni
• 1 tablespoon butter
• 1 egg, beaten
• 1 cup milk
• 1 1/2 cups shredded sharp Cheddar cheese
• 1 1/2 cups shredded mozzarella cheese
• 1/2 cup seasoned dry bread crumbs
• 2 teaspoons olive oil
• 1/2 teaspoon salt