Bring the bouillon to the boil. Add the noodles and cook for about 13 minutes. In the meantime clean and wash the zucchini, dab dry and cut into slices. Quarter peppers, remove seeds, wash, dab dry and cut into bite-sized pieces.
Clean and wash spring onion, dab dry and cut diagonally into pieces. For the last 4-5 minutes add zucchini, peppers, spring onions and lemon slices and cook. Slice parmesan and sprinkle over the soup. Garnish with oregano