Cut the onions, broccoli, garlic and leek into pieces.
Slice the raw potatoes. Meanwhile, let broccoli simmer in water for 5 minutes.
Fry the onions and garlic in a pan until they are slightly brown. Add a few pumpkin seeds to the pan and fry them briefly.
Put everything into the casserole dish and mix it well.
Rinse and drain the soaked cashew nuts.
Put all the ingredients for the cheese sauce together in a blender and mix everything until creamy.
Then add part of the sauce to the casserole, mix well and pour the rest over your casserole.
Put the casserole in the oven at 200°, top and bottom heat, bake it for about 50 minutes.