• 6 Ingredients
  • 8 slices pumpernickel bread
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  • 1 medium sweet onion , sliced an...
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  • 1 teaspoon brown sugar
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  • 2 tablespoons stone ground mustard
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  • 3 tablespoons butter or margarin...
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  • Show all (6)
  • Nutrition 100% match
  • Calories per gram: 1.9
  • Total fat: High
  • Show all

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