Adapted from The Curry Book: Memorable Flavors and Irresistibly Simple Recipes From Around the World, by Nancie McDermott, and found at splendidtable.com. This curry comes from southern Thailand, where many Thais follow the teachings of Islam. Mussamun is thought to be a pronunciation of the word "Muslim." In Thailand, mussamun curries are often made with chunks of beef, but chicken is popular as well. Make this one a day ahead and you will be rewarded with an extraordinary blossoming of spice-laden flavors. Serve with rice or noodles.