If I want an easy shrimp snack, or to include the shrimp in a salad 
(say with avocado, raw spinach, etc), I don't defrost first. I just 
microwave the frozen shrimp in a covered glass casserole dish. A 
couple minutes, then stir. Then another minute. You will have to 
experiment with the quantity (I weigh them) and your microwave. Do 
short intervals -- like a minute at a time -- to figure yours out.