Directions. 1  Using a 2 quart casserole dish with lid, put rice, hot water, butter and salt in dish. 2  Cover, and microwave on high power 5 minutes. 3  Cover and put back in microwave and cook on medium this time for 15 minutes. 4  Remove lid (careful again!) and fluff with fork. 5  Let stand 2-3 minutes. 6  Serve.