You can easily make this recipe gluten free by replacing the soy sauce with tamari. For a vegetarian option leave out the chicken, replace the fish sauce with soy sauce and the chicken broth with vegetable broth. Pretty much any vegetables will work so try to use up what you have on hand.
Nicoise salad can be served in parts so that family members get to put together a meal of their liking. If your kids are big fans of tuna you could serve this as a side dish with steak, pork or chicken.