Jamaican yellow yam is a starchy, tropical root vegetable with yellow flesh and a thick skin. It's a staple ingredient in Caribbean cuisine and is also used in African and Asian cooking. 
Taste and texture:
Jamaican yellow yam has a mild sweetness and a creamy texture when cooked. It's often compared to yucca in flavor and texture, it's less sweet and starchier than sweet potatoes. 
Preparation and uses:
Jamaican yellow yam can be boiled, baked, mashed, roasted, fried, stuffed, creamed, or candied. It can be added to soups and stew or eaten with other ground provisions and boiled dumplings. 
Nutrition: 
Jamaican yellow yam is high in vitamin A, potassium, fiber, and B-vitamins.