Cheeseburger Pie

Ingredients

• 1 pie crust, standard
• 1 Tbsp olive oil
• 1 onion, chopped
• 1 red pepper, chopped
• 2 cloves garlic, minced
• 1 lb ground beef
• 1 cup tomato sauce
• 1 tsp oregano
• 1 tsp salt
• 1/2 tsp black pepper
• 1/2 cup dry bread crumbs
• 1 egg
• 1/4 cup milk
• 1/2 tsp salt
• 1/2 tsp dijon mustard
• 2 cups cheddar cheese, grated