Cook macaroni as directed on package; drain. Rinse in cold water; drain and toss with oil. Mix pesto, tomatoes, olives and vinegar in large bowl. Arrange 2 cups of the macaroni and 2 cups of the spinach on pesto mixture; repeat with remaining macaroni and spinach. Cover and refrigerate at least 2 hours, but no longer than 24 hours. Add cooked tiny shrimp. Toss; sprinkle with cheese. Per serving: 10 Calories (kcal); trace Total Fat; (9% calories from fat); trace Protein; 3g Carbohydrate; 0mg Cholesterol; 4mg Sodium Food Exchanges: 0 Grain(Starch); 0 Lean Meat; 1/2 Vegetable; 0 Fruit; 0 Fat; 0 Other Carbohydrates Recipe by: Betty Crockers Smartcook Converted by MM_Buster v2.0n.