Black Spanish Round Radish

For some real heat, try a slice of the venerable Black Spanish. Turnip-shaped 4" roots with corklike black exteriors have extremely pungent white flesh that loses some heat when boiled or stir-fried. Listed in Hortus Kewenis , the 1789 catalog of plants growing at Kew Royal Botanical Gardens, England, as having been brought there in 1548.