Following package directions to cook pasta in boiling salted water just until tender but still firm. Drain, rinse with cold water and drain again. Place the drained pasta in a bowl and add tomatoes.

To prepare Pesto Dressing, combine basil leaves, garlic, 1/4 cup pine nuts and oil in a blender and process until smooth. Turn into a bowl and beat in cheese and half and half. Stir dressing into pasta mixture, then transfer to a serving dish and sprinkle with other 1/4 cup toasted pine nuts. Garnish with basil sprigs.