Well you can cook "With" pre-cooked shrimp. Meaning that whatever you need to have shrimp in must be cooked about 90 to 95% already. Then you add shrimp. Really you are heating the shrimp in whatever sauce or seasonings you are using. If you add the shrimp too early you will end up with tough, chewy shrimp. To add shrimpy seafood flavor try adding a bit of fish stock as liquid to replace some of the called for fluids in recipe a little goes a long way, to season shrimp marinate in seasoning first. You can also buy peeled and veined raw shrimp.