EXTRACTING MILK: Fresh coconut milk is made by combining grated coconut and plain water. To make "first milk", a thick liquid, put 1 grated coconut in a food processor with about 1⁄2 cup water, and pulse 3-4 times. Pour the mixture into a fine sieve set over a bowl, and press out liquid with your fingertips; this makes about 3⁄4 cup. (This milk will curdle if boiled, so it's added at the end of cooking to give flavor and thickness.) "Second milk" is thinner and won't curdle. Mix the pressed coconut from the first milk with about 3⁄4 cup water, and repeat the process above; this makes about 1 cup. Discard grated coconut. Fresh coconut milk, if stored in the freezer in an airtight container, keeps for several months.