Bring a medium pot of water to a boil and drop in the beans. Boil for a couple of minutes or just until crisp/tender. Drain and run under cold water to halt cooking. Pat very dry.

In a large mixing bowl toss together the beans, chicken, Gruyere, tomatoes and basil. Lightly dress with salad dressing of choice and serve on a bed of lettuce. You can also store the salad without the lettuce overnight in an airtight container in the fridge. I actually like it after it has been stored with dressing, but you could also store the dressing separately and combine right before eating.