* In a blender container or food processor, combine the basil, garlic, pepper, and salt if desired. Process until finely chopped. Add oil and vinegar; process until well blended. Set aside. In a 4-qt. salad bowl, combine tomatoes, zucchini, macaroni and cheese; toss lightly. Pour dressing over all; toss to coat. Cover and refrigerate at least 2 hours or overnight. Yield: 10 servings.