This is delicious.

1 lb thin spaghetti
1-16oz Zesty Italian Salad dressing
1 cup chopped celery
1 purple onion chopped
1 green and 1 red bell pepper, chopped
1 cup cherry tomato halves
2 to 3 Tbsps salad seasoning (found in the spice section)
grated Parmesan cheese

Cook and drain spaghetti. Mix all together, sprinkle with parmesan,
marinate at least 2 hours. Stir cheese in when ready to serve.
Sprinkle on more cheese and serve.

You can also add ripe olives, marinated artichokes or mushrooms. I
usually add all these. Makes it real pretty. A real crowd pleaser
as it makes quite a bit. Enjoy.