Boil macaroni and cook until al dente, about 7-8 minutes. Drain and rinse under cold water. Do not overcook pasta or it will not be able to hold up once the other ingredients are added.
2 cups elbow macaroni
While macaroni is cooking, stir together mayonnaise, vinegar, sugar, mustard, and salt until combined.
¾ cup mayonnaise, 2 tbsp apple cider vinegar, 2 tbsp granulated sugar, 1 tbsp yellow mustard, 1 tsp salt
Stir together macaroni, mayonnaise mixture, celery, and bell pepper. Place in the refrigerator and chill for 1-2 hours before serving.
2 stalks celery, ¾ cup red or orange bell pepper, ½ cup carrot, ½ cup red onion