Salade Niçoise

This almost ubiquitous salad has been upgraded in recent years by the addition of fresh tuna in place of the traditional canned. Either tuna is actually fine; each creates a different effect. You don’t even need to use tuna. Other firm-fleshed fish are also good. Aficionados of salades niçoise are dogmatic about such things as green beans, potatoes, tomatoes, and eggs—some pro, some con. This version contains all of them, but if you leave out one or two, the salad will still be good. Slende