Winter flounder—a.k.a. lemon sole when it’s big, and blackback flounder when it’s not—takes its name from the fact that it swims inshore to warmer waters during the winter months.

quartered • 2 cups of packed baby spinach • ½ peeled and sliced red onion • 2 pounds of fresh Alaska flounder fillets • 1 cup of assorted pitted Mediterranean olives • 1 cup of sliced c ...