1 (8 ounce) package Italian-style pasta
1 pound lean ground beef
1 cup chopped onion
1 cup sliced mushrooms
1/4 cup diced celery
2 cups Italian-style salad dressing
Combine pasta, beef, onion, mushrooms, celery and all of the Italian dressing in large/small mixing bowl; mix well.
Return pasta mixture to small mixing bowl; mix together. Cover; refrigerate 8 hours or overnight. Divide mixture into four fettuccine--three large, one medium and one small; bring into individual serving bowls. Serve with your favorite spaghetti sauce.