This recipe for seafood paella says to add mussels, prawns, squid and monkfish to the paella pan 5 minutes before finishing, stir and then cover with a lid.
I made this twice and I have never been able to cook the seafood in 5 minutes. The mussels will still be closed, and prawns doesn't look red throughout. On the second try, I let it cook a bit longer and overcooked the seafood, which shrunk into a very small size.
How can I tell if the seafood is done? How long do I generally have to cook seafood for in a covered paella dish?