Cook macaroni according to package directions; drain and chill in cold water; Cook peas and carrots according to package directions, drain and chill in cold water; drain. Put macaroni and vegetables in a bowl and toss with peanuts, cheese, chopped eggs and onion. In a small bowl combine mayonnaise, mustard, relish, salt and cayenne. Stir into macaroni mixture. Chill until serving time. Make approximately 6 cups.