1 (16 oz.) pkg. mostaccioli noodles
1 1/2 c. cider vinegar
1 1/2 c. sugar
1 tsp. salt
1 tsp. pepper
1 tsp. garlic salt
2 tsp. prepared mustard
1 med. onion, chopped
1 cucumber, chopped

Cook noodles; drain and rinse. Mix rest of ingredients together and toss in large bowl with noodles. Refrigerate approximately 24 hours. Stir occasionally.