1. Spread 1 teaspoon butter on each slice of bread, being sure to cover each completely. 2. Spread each generously with mustard. 3. Place 1 slice roast beef on top of each, gathering or ruffling the slice so beef covers bread but does not extend over sides. 4. Top each beef slice with 1 teaspoon sour cream. 5. Sprinkle with crumbled onions, top with a tomato wedge. 6. Garnish with parsley or watercress. ---------------------------------------------------------------------------
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Ingredients