Boil pasta \"al dente\" according to package directions. Wash and coarsely chop the arugula. Crumble the feta cheese. Fresh tomatoes, peeled from the skin and seeds, cut into cubes. Grind the dried tomatoes. Cut olives into halves. Mix all ingredients in a bowl, adding olive oil. Throw spaghetti in a colander, season with butter, stir, add the tomato mixture, salt and pepper and serve sprinkled with parmesan cheese.