Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
1         pound         ground beef
1/2       cup           chopped onion
1         jar           restaurant style medium -- (10 3/4 oz.) salsa con queso
2         tablespoons   prepared mustard
6                       hamburger buns -- split and toasted

Preparation:

Brown beef and cook onion in skillet until tender; stir to separate meat. Add Salsa Con Queso and mustard. Heat; stir often. Serve on toasted buns.