E.C.
Try this similar salad from Giada De Laurentiis - Everyday Italian:
http://www.foodnetwork.com/food/recipes/recipe/0,,FOOD_99...
It uses edamame, green beans, yellow wax beans, and cherry tomatoes with a fresh herb vinaigrette. Read the reviews of the recipe for more info and how people adjusted the recipe.
I made this for dinner a few weeks ago and my husband LOVED it. We've had it twice since. My grocery store has a frozen bag of mixed green beans, wax beans, and carrots. So I just take the carrots out and use them for something else.