Hamburger Pie

Ingredients

• 1 c. Bisquick
• 1/4 c. cold water
• 1 lb. ground chuck or more
• 1/2 tsp. salt
• 1/2 tsp. oregano
• 1/4 tsp. pepper
• 1/2 c. bread crumbs
• 1 (8 oz.) can tomato sauce
• 1/4 c. chopped onions
• 1/4 c. green bell pepper
• 1/4 c. 2% milk
• 2 c. shredded Cheddar cheese
• 1/2 tsp. dry mustard
• 1/2 tsp. salt