Blanch the beans ahead of time for an easy reheat just before dinner.
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.
This meal is best made just before serving. If making gluten free just confirm there is no gluten in the sausage and chicken broth.