Ideally, reheat the rice or pasta separately then add the shrimp back in. The reheated rice or pasta will gently warm the shrimp. Otherwise, you have two options - follow the stovetop saute method in the blog post above, or the oven method. Either way, add a little bit of water to the rice or pasta, use a lid to trap moisture, and expect to add a little butter or oil after the dish has reheated.