Boil noodles in salted water "al dente", drain, refresh with cold water and dripp off. Place noodles in a bowl.
Dice sausage and cheese and fold into the noodles. Wash spring onions, remove the dark green and cut the rest into rings. Add them with the olives to the pasta.
For the marinade season yogurt with salt and pepper, stir in oil and season to taste with vinegar. Mix well and marinade the noodle salad.
Wash and halve the cherry tomatoes, and garnish the salad.