2 large red onions finely sliced
2 oz cheddar cheese grated
shortcrust pastry (4 oz)
1 tbs balsamic vinegar
2 tbs soft dark brown sugar
fry the onion slowly in a tbs olive oil and knob of butter about 10mins. Add the vinegar and sugar and cook for another 2mins. Put onion into a pie dish and cover with most of the grated cheese. Cover with pastry and tuck in the edges. Pierce the pastry with a fork
and cook for 20mins at 200C . When brown on top let it settle a little and then turn it out upside down so that the pastry is on the bottom.