01 - Mix the fermented beetroot with the cooked beans. Add ground oats, finely chopped onion, crushed garlic, luggi, salt and pepper. 02 - Mix and divide into 6 equal parts. Shape each into a patty and place on a baking tray with baking paper. Bake for 30 minutes at 170 °C. 03 - Prepare a burger bun by cutting it in half, spreading it with soyannaise, putting the fermented beetroot, lamb's lettuce, beet patty, soyannaise again and fermented beetroot on top. 04 - Serve and enjoy!