ZESTY BLUE CHEESE BURGERS

1/2 cup Heinz Tomato Ketchup
1/3 cup crumbled blue cheese
2 tablespoons finely chopped onion
1 tablespoon Heinz Worcestershire Sauce
1 pound lean ground beef
4 sandwich buns, split, toasted (for serving)

For sauce, combine first 4 ingredients.

Lightly mix 1/4 cup sauce with meat; shape into 4 patties.

Grill or broil to desired doneness. Serve in toasted buns topped with remaining sauce.

Makes 4 sandwiches
Source: Heinz Ketchup Recipe Collection, H.J. Heinz Co., 1988