1. Cook the Macaroni: Bring a large pot of salted water to a rolling boil. Add the elbow macaroni and cook according to package directions until al dente, usually 7-9 minutes. You want the pasta to be tender but still have a slight bite. Overcooked pasta will become mushy in the salad.

2. Rinse and Drain: Once cooked, drain the macaroni thoroughly in a colander. Rinse the pasta under cold water to stop the cooking process and remove excess starch. This step is crucial for preventing the pasta from clumping and ensuring a light, separate texture in your cold salad. Let it drain completely.

3. Prepare the Dressing: In a large mixing bowl, whisk together the mayonnaise, apple cider vinegar, Dijon mustard, and granulated sugar until the mixture is smooth and well combined. Taste and adjust the sweetness or tanginess if desired.

4. Combine Ingredients: Add the cooled and drained macaroni to the bowl with the dressing. Then, add the finely diced celery, red onion, red bell pepper, and chopped hard-boiled eggs.

5. Gently Mix: Using a large spoon or spatula, gently fold all the ingredients together until the macaroni and vegetables are evenly coated with the creamy dressing. Be careful not to mash the pasta or eggs.

6. Season to Perfection: Season the macaroni salad generously with salt and black pepper to taste. Start with a little, mix, and then taste again. Remember, the flavors will deepen as it chills.

7. Chill Before Serving: Cover the bowl tightly with plastic wrap and refrigerate for at least 1 hour, or preferably 2-3 hours. This chilling time allows the flavors to meld beautifully and the pasta to absorb the dressing, resulting in a richer, more cohesive salad.

8. Garnish and Serve: Just before serving, give the salad another gentle stir. Garnish with fresh chopped parsley for a burst of color and freshness. Serve cold and enjoy!