This is one of Jamie Olivers' recipes that I made very often this year (and I was asked for the recipe by several friends). It is super easy: Just put salmon steaks, large gamba's, (uncooked) asparagus, wedges of lemon and a chopped red pepper in a baking tray. Put in a pre-heated oven at 200 for 30 minutes. For some extra flavour add slices of pancetta on top for the last 5 minutes in the oven.
Great to serve with lentils.