Sandwich Filling – Roast Beef Spread Mix: 1/2 cup sour cream1 tablespoon dry onion soup mix2 tablespoons horseradish sauce1 teaspoon salt1 teaspoon pepper Serve on bread; top with lettuce and sliced roast beef. Rate this:Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on Pinterest (Opens in new window) Pinterest Email a link to a friend (Opens in new window) Email Like Loading... Related