INGREDIENTS
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1 pound (96%) extra lean ground beef, see shopping tip
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1 1/2 slices whole wheat bread, remove crusts (I used Milton’s Multigrain bread)
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1 cup onions, chopped
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2 egg whites
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3 tablespoons ketchup
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1 tablespoon spicy brown or yellow mustard
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1 tablespoon Worcestershire sauce
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1/4 teaspoon salt
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Fresh ground pepper, to taste
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Ingredients for Topping:
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1/4 cup ketchup
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1 tablespoon spicy mustard or yellow mustard
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2 teaspoon brown sugar, packed