Stir-fry: In same pan or wok, you should have some cooking oil left over. If not, add 1T. When hot, add the chili, scallions and garlic. Fry for 10 seconds until fragrant. Add Cognac, butter, salt, sugar. Reduce just a bit - you should have a nice sauce that will coat the prawns. Add the prawns back in the pan. Fry until prawns are cooked through. Again, timing depends on size of prawns. For small = 1 minute; medium = 1.5 minutes; large = 2 minutes; colossal= you prob have a personal chef. Turn off heat, add the toasted coconut and immediately serve.