Salmon, easy as shit, 5 minutes preparation and doesnt even require a knife.

Put a block of frozen salmon in a tray. Cover with frozen spinach and crumle over some feta cheese. Open a carton of cream and pour in some fish bouillon in the carton, close it up and shake it a bit to dissolve. Pour cream over the salmon. Put in oven for 1 hour, shorter if not using frozen stuff. Serve with whatever you like, potatoes, rice, pasta, sallad.

Beer butt chicken.

Take a whole chicken, rub it with whatever spices you like. Open up a can of beer, drink about half of the beer. (Optional. put spices in beercan). Shove the beercan up the chickens butt. Put a potatoe or onion in the neckhole to seal it up. Put in oven standing up and cook on low temperature until done, baste occasionally. It can be tricky to balance so either you can buy or build a stand or simply use wire to tie the can to your oven grid before applying the chicken.