Katuk, Tropical Asparagus. Delicious young shoots! It is one of the most popular leaf vegetables in South Asia and Southeast Asia and is notable for high yields and palatability. The shoot tips have been sold as tropical asparagus. In Vietnam, people cook it with crab meat, minced pork or dried shrimp to make soup. In Malaysia, it is commonly stir-fried with egg and dried achovies. It is among only a few flora containing vitamin K.