Hamburger Pie

Ingredients

• 1 c. Bisquick baking mix
• 1/4 c. cold water
• 1 lb. ground beef
• 1/2 tsp. salt
• 1/2 tsp. ground oregano
• 1/4 tsp. pepper
• 1/2 c. fine dry bread crumbs
• 1 (8 oz.) can tomato sauce
• 1/4 c. chopped onion
• 1/4 c. chopped green pepper
• 1 egg
• 1/4 c. milk
• 1/2 tsp. salt
• 1/2 tsp. dry mustard
• 2 c. shredded Cheddar cheese (8 oz.)