Grilled Chicken With Tomatoes and Corn, Mango Sticky-Rice Popsicles and the Nicest Niçoise

You can make a niçoise salad year-round, and I do: I always have canned tuna in the pantry and olives and anchovies in the fridge, and the grocer closest to me stocks cherry tomatoes and green beans even in the depths of January. It’s not eating with the seasons, but it is eating with my instincts, and when I want punch and tang and heft — with good-for-me greens — it’s the only salad that’ll do.But a summer…