I guess to get a lot of protein into an elderly man who is short of it, I have had to cook a lot of fish. So last time it was crumbed fish. Dip fish into flour, then egg and then into breadcrumbs, seaweed flakes and seasoning. Fry lightly.
These days I am cooking quinoa instead of potato every second meal. Here we also have mashed kumera, the New Zealand sweet potato. And asparagus and tomato.