Plantains are big
starchy bananas that MUST be cooked. If
you can't find them, use under-ripe
bananas (still greenish).
potatoes and American yams are really
the same thing, just slightly different
varieties, one being more orange, the
other more yellow in color, with a very
slight difference in taste. African and
Asian yams are variety of starchy tubers
with white flesh.
When using real
Southeast Asian tapioca/sago, you may
need to cook it separately first until
transparent before adding to the Kolak.
If you can't find
cans of frozen coconut milk at
supermarkets or health food stores, try
Indian shops that often have
"concentrated coconut cream". Just
dilute this with water to get coconut