Cook the noodles for about 6 minutes, they should still be firm to the bite. Bring the vegetable stock to the boil and add the frozen butter vegetables. When the vegetables are warm, take the pan off the heat and stir in the sour cream. Put the vegetable-sour cream broth with the noodles in a baking dish and sprinkle with the cheese.
Bake in the preheated oven at 180 ° C for about 25 minutes so that the cheese gets a nice brown color.