You've adjusted the recipe from 4 Servings (as originally posted) to 4 Servings. The ingredients above reflect 4 Servings, but the instructions reflect the as-posted 4 Servings. You may need to adjust the times, temperatures or quantities mentioned in the recipe below as needed.
Boil Macaroni for 10 minutes. Drain. Add to bowl. Drain can of tuna. Add to bowl. Add all ingredients. Mix. Chill.