Preheat the oven to 180 ° C (top / bottom heat). Wash, clean and cut the vegetables into large pieces. Either put the vegetables in a multi-chopper and mix or grate or cut into small cubes.
Puree the beans with the oat milk in a high-speed blender and place in a bowl with the remaining ingredients. Add the vegetables and mix everything carefully.
The mass should stick together but still be slightly damp. If necessary add some oat milk. Divide the mixture into eight equal portions and shape into cookies.
Line a baking sheet with parchment paper, brush with a little oil and place the cookies on the sheet. Bake for about 30 minutes.
The cookies go well with salads, as a sandwich or can also be eaten as a patty or burger patty.