Cheeseburger Pie

Ingredients

• 1 lb. lean ground beef
• 1/2 tsp. salt
• 1/4 tsp. pepper
• 1/4 c. onion
• 1/4 c. green pepper
• 1/2 c. soft bread crumbs
• 1/2 c. tomato sauce
• unbaked pie crust
• 1 c. grated sharp cheese
• 1 beaten egg
• 1/2 tsp. Worcestershire sauce
• 1/3 c. milk
• 1/2 tsp. dry mustard