Halve the pretzel buns and toast the insides.
Cut the gherkins into slices.
Peel the onions and cut them into rings.
Then, melt the vegan butter in a pan over medium heat, briefly sauté the tomato paste in it, then add the onions and sugar and brown for 15 minutes, stirring occasionally. Add salt and pepper to taste.
Mix the sweet mustard, BBQ sauce, apple cider vinegar and maple syrup to make a sauce. Season with salt and pepper.
Heat the rapeseed oil a pan and sear the planted.pulled over high heat for 3 minutes.
Spread the sauce on the inside of the buns, then top the burgers with sauerkraut, planted.pulled , lettuce leaves, pickles, and the caramelized onions.