Jump to Recipe Print Recipe Roast Beef Sandwich Filling Vivian Rudeen A very simple, delicious sandwich filling! Ingredients Instructions Ingredients Ground cooked roast beef or roast porkchopped sweet pickleschopped onionmayonnaise Instructions Grind left-over roast beef or roast pork. Add chopped sweet pickles, chopped onion, and mayonnaise to taste. Spread on bread.