It is weird isn't it - before long you will have the supermarkets catch on to something like this - dripping on bread or sarnies and they will charge a little less - possibly 4 quid a sarnie.
They already do bread and butter pudding ready made to buy - this type of pudding was knocked up on a Sunday tea time with left over stale white bread a drop of milk an egg and some currents or sultanas
There are a few other left over dishes, made from the left overs that you can now buy in supermarkets ready made.... it is no wonder food is thrown away in this country by the ton each day, no one seems to use lefts overs and yet will buy the left overs ready prepared!

Seriously I think I'll market a range of delicacies such as dripping on toast. lamb fat sandwiches, fried tripe, rag pudding, and gravy with bread soaked in it as cheap soup. I reckon I could be onto a winner!
there is nout wrong with eating left overs