Add Red Kidney Beans (125 gram), Butter Beans (125 gram), Zucchini (50 gram) and Carrot (50 gram) into a blender. Blend until smooth and creamy.
Add Olive Oil (to taste) to pan and fry Red Onion (1) with Mushroom (100 gram) and Fresh Thyme (to taste).
When the onions are brown, add in the bean mixture, Oats (1 handful) and Fresh Parsley (1 handful). Season with Salt (to taste) and Ground Black Pepper (to taste). Once everything is mixed well, remove from heat and cool.
Once the mixture has cooled, add the beaten Egg (1) and Rye Bread (50 gram). Leave in refrigerator for 15 minutes so it firms slightly. Meanwhile, heat oven to 180 degrees C (350 degrees F) and prepare an oven tray with a small amount of Oil (to taste).
Remove patty mixture from refrigerator and prepare a cutting board with flour. With floured hands, mold mixture into large patties. Place on oiled baking tray and cook in oven until tops are golden brown.
Serve on Hamburger Bun (4) with Tomato Sauce (to taste) and Fresh Baby Spinach (to taste). Enjoy!