Beef supper casserole

MMMMM----- Recipe via Meal-Master (tm) v8.05
  
       Title: Beef Supper Casserole
  Categories: Casseroles
       Yield: 6 Servings
  
 MMMMM----------------MARTHA WHITE'S SOUTHERN SAMP---------------------
       1 lb Ground beef
       1 c  Chopped onion
       1    Egg
       1 c  Dairy sour cream (8 ounces)
     3/4 ts Salt
     1/4 ts Pepper
            Old-Fashioned Buttermilk
            -Biscuits (1 recipe)
       1 c  Grated sharp Cheddar cheese
            -(4 ounces)
  
   Preheat oven to 400. Grease bottom of a 9-inch square
   baking pan. Brown ground beef in skillet; drain and
   reserve drippings. Saut onion in reserved beef
   drippings until tender; drain. Beat egg in mixing
   bowl; stir in sour cream, salt, and pepper. Prepare
   biscuits as directed; except--after kneading gently,
   divide dough in half. Roll out first half on lightly
   floured board or pastry cloth to fit dimensions of
   pan. Pat dough tightly into bottom of pan. Sprinkle
   dough evenly with ground beef. Add onion layer and
   pour sour cream mixture over all. Sprinkle with
   cheese. Repeat rolling procedure with remaining
   biscuit dough. Place dough on top of casserole
   mixture. Bake for 30 to 35 minutes or until golden
   brown. Cool for 10 minutes before serving. Cut into
   squares to serve.
  
 MMMMM