Vegan burger with mushrooms, onion and piccalilli

Preheat the oven to 200 ° C. Bake the roses rolls in the middle of the oven in about 6 minutes.

Meanwhile cut the mushrooms into slices and the onions in rings.

Heat the oil in a frying pan and fry the mushrooms for 4 minutes on a high heat. Add the onion and cook the vegetable mixture for another 5 minutes.

Season with pepper and salt.

Meanwhile, heat the grill pan. Brush the burgers with the rest of the oil and grill in 6 min. Golden brown and done. Turn halfway.

Halve the rose rolls. Top the bottom halves successively with the lamb's lettuce, burgers, mushrooms and onion.

Spoon 1 tbsp of piccalilly on each roll. Cover with the top bread halves and serve.