Cook the pasta in boiling salted water for about 10 minutes. Wash, clean and dry the tomatoes. Quarter and remove seeds. Cut the flesh into slices. Drain green and black olives, cut green ones into slices.
Pluck rosemary needles from the branch. Drain the pasta, rinse with cold water and drain. Heat olive oil in a large pan. Add pasta, tomatoes, olives and rosemary, mix and fry for about 5 minutes. Season with salt and pepper
Plate: Pillivuyt