Cook the pasta as usual, cut the onions, cucumber, meat sausage and mushrooms into small cubes and place in a large bowl. Drain the peas and corn well and add. Pour the mayonnaise on top and wash out the rest of the mayonnaise with cucumber water (approx. 5 tablespoon from the cucumber jar), mix everything together. Put the drained pasta on top, season with salt and pepper, then chill the salad.
Tastes particularly good the next day when it is pulled through.