Grilled Gouda & Bacon Sandwich

The successful gastropub The Spotted Pig is one of my favourite places to meet friends for lunch. The menu features a grilled cheddar sandwich with onion marmalade, which I tried recently. The sandwich was predictably great, but the onion marmalade was flavoured with red wine and I didn’t care for it. So I set to work on an onion marmalade of my own and I’m really pleased with it, especially because it has no added sugar in it and just a touch of sherry vinegar to add a slightly sharp contr