Almost like in ceviche, where the citrus juice cures the fish, the lemon and lime in this dressing soften the delicate ribbons of summer squash as the salad rests.
Look for zucchini and yellow squash between 6 and 8 inches in length; avoid the really big ones, as they tend to be pithy. If you can’t find both varieties of squash, just one kind works as well.
