- Boil the elbow macaroni in a large pot of salted water until it's al dente. 
- Drain the pasta and let it cool completely. 
- Chop the green pepper, celery, and onion finely, ensuring an even distribution of flavors. 
- Shred the carrot and set aside. 
- In a large bowl, combine the cooled macaroni with mayonnaise, chopped vegetables, and shredded carrot. 
- Make sure to mix well so every ingredient is well-coated. 
- Season the salad with salt and black pepper, adjusting to taste as you prefer. 
- Stir everything together one more time. 
- Cover the bowl with plastic wrap and refrigerate for at least two hours before serving.