What does one do when unexpected visitors turn up on the doorstep just at lunch time? Offer them a bite of lunch of course.
What if there is not enough to go round? Think of something quick and easy that will cook while you are laying the table of course.
Here is an idea which I tried, which worked and which will henceforth be a standby in my kitchen cupboard for just such an occasion.
I diluted a jar of ready-made tomato and roasted pepper pasta sauce with a vegetable stock cube and water, added a tin of rinsed cannelini beans and a handful of macaroni and simmered it until said macaroni was cooked. Then I stirred in a good handful of parmesan (and put more on the table, ready grated) and served it with a good sour dough loaf of bread. Delicious. Problem solved. Sigh of relief.