Nifty hamburgers on a bun

---------- Recipe via Meal-Master (tm) v8.01
  
       Title: Nifty Hamburgers on a Bun
  Categories: Breads, Ground beef, Beef
       Yield: 4 servings
  
       8 ea Hamburger Buns; *                   1 x  Prepared Mustard Or Catsup
       1 lb Lean Ground Beef                  1/4 c  Onion; Chopped, 1 small
       1 ts Salt                              1/4 ts Pepper
  
   *    Hamburger buns should be the small ones or use 6 slices of bread.
   ~-------------------------------------------------------------------------
   Heat oven to 500 degrees F.  Spread cut sides of hamburgers buns or one
   side of each bread slice with mustard.  Mix meat, onion, salt and pepper.
   Spread mixture over the mustard, being careful to bring it to the edges of
   the buns.  Place meat sides up on an ungreased baking sheet.  Bake until
   desired doneness is reached, about 5 minutes. NOTE: If you like, you can
   have these burgers ready and waiting in the freezer for last-minute
   cooking.  After spreading the meat mixture over the buns, wrap each
   securely in heavy-duty or double thickness of regular aluminum foil and
   label; freeze no longer than 2 months.  To serve, unwrap desired number of
   hamburgers and bake about 10 minutes.
  
 -----