We kick off with boil-in-the-bag white fish in parsley sauce. This, I recall, had a thrilling element of danger to it. Would Dad scald himself as he lifted the bags from the bubbling pan?

The fish finger sandwich ... and you avoid having to throw away tired leftover veg. Make a boil-in-the-bag omelette You’ve probably heard of boil-in-the-bag rice, but how about a boil-in ...