Halve the lye buns and toast the insides.
Cut the pickled cucumbers into slices.
Peel the onions and cut into rings.
Then melt the vegan butter in a pan over medium heat, briefly roast the tomato paste in it and then add the onions and sugar and let it brown for 15 minutes, stirring occasionally. Add salt and pepper if necessary.
Mix the sweet mustard, BBQ sauce, apple cider vinegar and maple syrup into a sauce. Season with salt and pepper.
Heat the rapeseed oil in a pan and fry the planted.pulled BBQ for 3 minutes.
Spread the inside of the buns with the sauce, top the burgers with sauerkraut, planted.pulled BBQ, lettuce leaves, pickles and caramelized onions.