Simon's Grandma Madge was famed for her bread sauce.
Here's 'How She Did It' (transcribed below).
As early as when you are washing up breakfast things,
put into a small saucepan about 1/2 pint of milk,
cut an onion in half and put in 3 cloves in each half
and place into milk on the lowest possible gas.
It needs to be on anything up to a couple of hours
so it's best to do it while you have to be in the kitchen most of the time.
You need about 1/2 small basin of bread crumbs.
When the onion feels it should be about ready, remove from gas
remove the cloves and any part of onion that feels hard,
and just mix it into crumbs, with a nob of butter.