A nice three ingredient dish we accidentally discovered tonight: heat up a can of coconut milk (I like the higher fat ones), add a container of pre-cooked shrimp, heat up the shrimp in the coconut milk, then pour it over rice. Worked great even with left over rice, and tasted really nice even though it wasn't seasoned at all.
Could also use raw shrimp and just leave it cooking in the coconut milk for a few minutes longer. Might even taste fine with canned shrimp, as a backup dish when unable to get to the store or do anything elaborate.