Ingredients:
1 pound (96%) extra lean ground beef, see shopping tip
1½ slices whole wheat bread, remove crusts (I used Milton’s Multigrain bread)
1 cup onions, chopped
2 egg whites
3 tablespoons ketchup
1 tablespoon spicy brown or yellow mustard
1 tablespoon Worcestershire sauce
¼ teaspoon salt
Fresh ground pepper, to taste
Ingredients for Topping:
¼ cup ketchup
1 tablespoon spicy mustard or yellow mustard
2 teaspoon brown sugar, packed
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