Cheeseburger Pie with Savory Beef, Cheese, and Flaky Crust (Easy 45-Min Recipe) - Recipe By Me

Ingredients

• 1 pound ground beef (80/20 blend)
• 1 small yellow onion, finely chopped
• 2 cloves garlic, minced
• 1/4 cup ketchup
• 1 tablespoon yellow mustard
• 1/2 teaspoon kosher salt
• 1/4 teaspoon ground black pepper
• 1 cup shredded cheddar cheese
• 1 cup shredded mozzarella cheese
• 1 unbaked 9-inch deep-dish pie crust
• 2 large eggs
• 1/2 cup whole milk
• 2 tablespoons all-purpose flour