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kristenvsmothra
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Bake your potatoes however you like - my favourite method is prick the potatoes all over, then drizzle with olive oil, salt and pepper and pop in the air fryer for 45-50 minutes on 200°c/400°f.
Preheat a large frying pan over a medium heat and add in the butter and truffle oil. Throw in the onions and garlic then sweat off slowly for 35-40 minutes.
Add in the thyme, vinegar, marmite (if using), port and brown sugar. Stir through and leave to continue caramelising for another 15-20 minutes.
Slice off the top of the jacket potatoes with a sharp knife and scoop out the middles into a bowl. Mash the potato and stir through the cream cheese and 2 heaped tbsp of caramelised onions and season well with salt and pepper.
Stuff the onion mixture back into the hollowed out jackets and top with a baguette slice and plenty of grated cheese, then pop onto a tray into the oven or air fryer on 200°c/400°f for 20 minutes to reheat and gratinate the cheese.