Hake and hard boiled eggs add enough substance to this salad to make it appropriate for lunch or even a light supper, especially when the temperatures soar. It's also given heft with potatoes cooked grains and extra goodness with green beans. The salad is a great way to use up any leftover cooked grains you might have on hand, and any kind can work: rice, bulgur, farro, quinoa, or even couscous. The fish, potatoes, green beans, and eggs are all simply boiled in salted water.