step 1
Boil the onion in a medium saucepan in 1 inch of water until it has turned transparent.
step 2
Add a knob of butter, the sage and the stockcube and stir until its dissolved, seasoning with salt and pepper.
step 3
Stir in breadcrumbs. Add boiling water until mixture resembles thick porridge, add more bread if it becomes too watery.
step 4
Transfer to oven proof dish and cook in the oven for 30 minutes at 170 degrees, or until a brown crust forms on top.