1 lb extra lean ground beef

4 tsps prepared horseradish

2 tsps Dijon mustard

3 tbsps fat-free sour cream -- * see note

1 tsp paprika

1/4 tsp pepper

1/8 tsp salt -- optional

4 hamburger buns -- split

In a bowl, combine the first seven ingredients; mix well. Shape into four patties. Pan-fry, grill or boil until no longer pink. Serve on buns.

* Betsy's addition