Escarole is a slightly bitter green in the chicory family. It resembles lettuce, but packs plenty of vitamins and minerals, making it a great choice for the health conscious. Escarole prefers cooler temps, so grow it in early spring or late summer for fall harvests. The hearts, served with a warm dressing and caramelized walnuts and onions, make a delicious salad. Cooked escarole pairs nicely with beans for a warming fall soup. The flavor is best after frost.