Beef Diablo Crockpot

1 pound beef pot roast, boneless
¾ teaspoon chili sauce
3 to 4 potatoes, peeled and sliced
¾ teaspoon Worcestershire sauce
¼ onion, slice
¼ teaspoon vinegar
1 ½ teaspoons flour
¼ teaspoon sugar
¾ teaspoon mustard

Tim all excess fat from roast. Place potatoes and onion in bottom o crock-pot. Make smooth past of flour, mustard, chili sauce, Worcestershire sauce, vinegar and sugar. Spread over top of roast. Place roast in crock-pot on top of potatoes and onions. Cover and cook on low setting for 10 to 12 hours on High for 5 to 6 hours.