can you please advise a novice what to easily put on my toast to make a
substantial meal please? many thanks

cheese, vegetables, mushroom, pickles, especially when cooked together
in a sandwich maker. Fried egg is nice too, perhaps with some
horseraddish ...

Or make french toast (fried after soaking in milk/egg/cinamon) with jam,
fruit, or honey.

Hmmm that is a long time ago I had one of those.