Boil your macaroni in a heavily salted pot on medium heat for 15 minutes or until al dente.
Drain and rinse under cold water. This stops the cooking process as well as get rid of the starch that keeps the macaroni clumped together. Set the macaroni aside in a bowl.
Add in your diced celery, diced red onion, diced red bell peppers, carrot and grated mozzarella cheese.
In a separate bowl, mix your mayo, lemon juice, sugar, salt, black pepper and garlic powder until well combined to form your dressing.
Add your dressing to the macaroni salad and mix until fully coated.
Refrigerate for a minimum of 1 hour or overnight before serving.