Chayote goes by many names, but it tastes unlike any other squash. A cross between a zucchini and a cucumber, the chayote is prepared similarly. Look for dark to light green, firm pear-shaped fruit that is free of blemishes. It may be kept in the refrigerator, lightly wrapped, for at least 2 weeks. Prepare as summer squash, but expect a crisper consistency and longer cooking time. Store at 45°F.