Lettuce: Romaine

Peak Season: Year-round

Perfect Pick: The ideal Caesar salad staple has crisp leaves that are free of browning edges and rust spots. The interior leaves are paler in color with more delicate flavor.

Handle with Care: Refrigerate romaine for 5 to 7 days in a plastic bag.

The Payoff: Vitamin K, which is needed for blood clotting and bone health.