Approx 1Kg of onions. I used about 6 regular onions, 2 reds and 2 shallots - so you can mix it up a bit with whatever you have. 2 cloves of garlic crushed, knob of butter, 2 table spoons of olive oil, teaspoon of sugar, seasoning, a glurg of white wine/brandy, 2 pints of dark stock.
Chop the onions and fry them (hot) in the oil and butter until they start to caramelize, add the garlic, sugar, wine and seasoning. Stir it all in and cook until it's a sticky mess (don't allow it to burn). Then add the stock and let it simmer for an hour. Serve with cheese, garlic bread, croutons etc.