extra-lean ground beef
finely chopped onions
HEINZ Tomato Ketchup
HEINZ Yellow Mustard
hot dog buns, cut into thirds
Heat oven to 350ºF.
Mix first 4 ingredients just until blended.
Arrange bottom halves of buns, cut sides up, in 13x9-inch baking pan sprayed with cooking spray. Spoon about 1 Tbsp. meat mixture onto each; flatten with spatula. Top with pickles, Singles pieces and tops of buns; cover.
Bake 30 to 35 min. or until meat mixture is done.