Kedgeree, which you can make with any smoked fish or cooked salmon - I make it with basmati rice, onion or spring onion, butter, curry powder, fish, hard-boiled eggs (not too hard), mushrooms, peas, parsley and lemon juice
Smoked mackerel pate, very simple if you have a food processor - remove skins from smoked mackerel, flake into processor bowl, add some cottage or curd or cream cheese, squeeze of lemon juice, maybe some parsley. Process till smooth. Eat with lovely hot buttered toast or some crusty bread. Salad, fruit, complete meal.
Fish pie - I make it with a mix of white fish, salmon, smoked haddock. You can buy fish pie mix, or you can cut up some fish yourself. Remove all skin and bones, so easiest to use fillets. The classic way is to poach in milk first and use the milk to make a bechamel, but I prefer to make a bechamel sauce and add some chopped parsley. Put a layer of cooked, drained spinach and the raw fish chunks in the bottom of a pie/casserole dish, put in some quartered hard-boiled eggs (optional), cooked or raw prawns. Pour over sauce and top with mashed potato, mixed with sliced leeks sauted in butter, and finish off with lots of cheese. Bake till all brown and bubbly. It doesn't take long for the raw fish to cook, especially if the sauce and mash are hot when you assemble the pie.
Marinated tuna steaks marinated in a mix of soy sauce, ginger, garlic, sesame, lime juice, just seared, not cooked through. Serve with stirfry vegetables and noodles or rice.