I’m a boiler & a roaster! And sometimes in my slow cooker lol.
Boil/slow cook the gammon (skin on) covered by full fat coke & pineapple (or either/or). Sometimes I add 5-6 whole cloves and a teaspoon (ish, I never measure!) of black peppercorns. Boil then simmer until the gammon reaches at least 71C (time depends on the size of the joint).
I have asbestos hands so I don’t bother let it cool before the next part… (please be careful lol).
Using a sharp knife, cut the skin off, but make sure you leave a layer of fat on the joint (take off any string or that weird plastic wrapper some joints have before you do this lol).
I cut a series of diagonal cuts across the fat, turn the joint & cut diagonal lines the other way to make diamonds in the fat. Don’t cut into the meaty bit.
If you’re feeling fancy, you can stud every diamond with a whole clove.
Preheat an oven to 180c, put the scored joint on a baking sheet.
Make up a concoction of whole grain mustard, honey & brown sugar (a wodge, maybe a tablespoon of honey). Paste this wonderous gloop all over the diamonds (I kind of wiggle the diamonds to get the mixture in the cracks) and cook for about 10 mins until brown & bubbling.
Don’t walk away for a wee, because it will invariably burn before you’ve finished! I know this from experience, but then my oven hates me (I swear it knows what I’m thinking & smirks when I walk out the kitchen).
And that’s how I cook gammon.
Sometimes I’ll throw orange peel into the pot, a couple of bay leaves, the odd onion.
If I slow cook it, I use high until the liquid boils, then turn it onto low for around 6 hrs (depending on size, the smallest I usually cook is 1.2kg).