Sweet And Sour Beef
["2 c. cubed cold roast beef", "2 Tbsp. flour", "2 Tbsp. butter", "1 tsp. dry mustard", "1/2 c. vinegar", "1 pkg. dry onion soup mix", "1/2 c. hot water", "1 small can pineapple chunks, drained"]
["Brown cubes with butter in a large skillet.", "Stir in flour. Combine the remaining ingredients and add to meat mixture. Simmer 20 minutes and serve over fluffy rice."]
["cold roast beef", "flour", "butter", "dry mustard", "vinegar", "onion soup", "hot water", "pineapple"]