I forgot to share that my husband used to cook yam - that violet root crop. Actually, the yam is the harvest from our garden. My husband plants them in time for a Christmas harvest. He would cook it for more than 1 hour in a vat, stirring and stirring until the mixture of yam, condensed milk and coconut milk becomes sticky. He then places the cooked yam in foil containers for our giveaways to neighbors and relatives. It's a tiring chore that's why we just buy items for giveaways instead of cooking.
I have never had it but it sound really good but yes I can see that it would be a lot of work to prepare. I bet people really enjoyed and appreciated it though because it is not something they would do themselves. I enjoy gifts like that.