How about a pasta salad? It can be with anything you have in the house, but does need pasta, cheese, and usually lunch meat. From there, most anything goes. Peas, lettuce, olives, green beans, tomatoes, onions, celery. If the onions are strong you can let them sit in cold wsater for awhile, then drain. I like scallions best.
For dressing, I always doctor mayo. Got a lot of options there, too. Yogurt, cream, a good vinegar,basil. If it gets too runny, a little sugar thickens cream. And a lot of tasting to check flavor.
Makes a whole meal.