Callaloo, Chopped in Salt Water 18 oz (1 lb 2 oz) 210 g can. Product of Jamaica. Callaloo is known for its high nutritional value, being rich in vitamins A, C, and K, as well as iron and calcium. This makes it not only a tasty addition to meals but also a healthy one. To Serve: Put contents of can into a saucepan and heat thoroughly. Drain. Add one ounce of butter or margarine and a dash of black pepper. Toss and serve while hot. Callaloo is extremely versatile and can be used in a variety of dishes. It's perfect for traditional Caribbean recipes like callaloo soup, as a side dish with meats, or as a filling for savory pastries.