Get your lamb ribs out of the fridge at least an hour before you want to cook. Preheat your oven to 220°C (425°F/gas mark 7). If you’re using the outdoor grill, get it up to the same temperature – nice and hot! Lightly score the lamb fat with a sharp knife, and season the joint with salt and chilli flakes.
Roast your lamb straight on a rack in the oven or right on the grill over direct heat, so the fat drips down and doesn’t suffocate the meat. Cook for 20 minutes, then drop the heat to 135°C (275°F/ gas mark 1). You’ll need to cover with foil for both indoors and outdoors (put the lid on outdoors, too). Slow-cook for another 1 1⁄2 hours.
While the lamb is cooking, get the pineapple salsa made. You need a high heat, so if you’re cooking outside, do it in the first 20 minutes of the lamb cook. Inside, use a griddle pan in your own time. Grill the pineapple steaks until you have a nice char. Set them aside to cool, then dice.
Chuck the chopped pineapple into a bowl with all the other salsa ingredients, season with salt and pepper and mix well. Set aside for the main event. After 1 1⁄2 hours, remove the foil and lid, and see where you are at with the lamb cook. The meat should be pulling away from the bones and feel quite tender to the touch.
Continue cooking without foil until you’ve got a nice crisp on the outside. That crunchy savoury more-ish lamb fat will be the single best taste you’ll have had since the first time you had a pork scratching in a sunny beer garden with a lovely pint of pilsner.
Let the lamb ribs rest for 5 minutes but not much longer – you do not want to bite into lukewarm or cold fat, it needs to be hot and crispy. Remove all the bones and slice the lamb ribs into bite-size morsels of pure lamb fat heaven. Oh gosh, I wanna cook this right now. So jealous of your burger!
Toast your buns (griddle pan or direct heat) and begin the build. If you wanna go a bit gnarly, dip the soft insides of the bun halves into the lamb fat before toasting. Naughty deliciousness!
Here’s the build: bottom bun, lamb rib meat, salsa, love – but don’t get lost in your creation, you still need to put the top bun on and eat! – top bun, eat!