Hi Prof, I would fully defrost them for easier cooking. Although you can cook them from frozen using the oven method below,if you are not sure,cook the after defrosting.Put a piece of butter on a square of foul big enough to hold your filler put the fish on the butter and squeeze a drop of fresh lemon juice over the top. Wrap each fillet loosely in the foil and place on a tray put in a medium hot oven for about 15 minutes.
Or you could lightly oil a frying or non stick pan add a small knob of butter to the pan and a splash of oil to stop the butter from burning. Put the salmon in the pan - skin side down, and cook for about 4-6 minutes on one side or until the skin is crisp turn over for the last couple of minute to finish the fish off. You could add a dash of cream if you like and a touch of soft herbs such as dill.
I hope this helps,all the best. Rab