1-First Step: Cook the pasta Bring a large pot of salted water to a boil. Add 2 cups elbow macaroni and cook until al dente, which usually takes about 7 to 8 minutes. You want the pasta tender but still firm, because it will soften a little more as it chills. When the macaroni is done, drain it right away. Then rinse it under cold water to stop the cooking process and cool it down fast. This step matters because warm pasta can make the mayonnaise dressing thin and loose.

2-Second Step: Make the dressing In a large mixing bowl, whisk together 1/2 cup mayonnaise, 1 teaspoon Dijon mustard, and 1 tablespoon white wine vinegar until smooth. The dressing should look creamy and even, with no streaks of mustard left behind. Taste the dressing if you want to check the tang level before adding the pasta. If you like a sharper flavor, you can later add a little more vinegar or mustard, but start with the recipe amounts first.

3-Third Step: Add the vegetables Stir in 2 stalks finely chopped celery, 1 cup diced red bell pepper, and 1/4 cup finely chopped red onion. Mix until the vegetables are evenly coated in the dressing. The celery adds crunch, the bell pepper brings sweetness, and the red onion gives a mild bite. If you are making this for kids or anyone who prefers a softer onion flavor, chop the onion very finely so it blends into the salad more easily.

4-Fourth Step: Fold in the pasta Add the cooled macaroni to the bowl and gently fold it into the dressing and vegetables. Use a spatula or large spoon and move slowly so the pasta does not break apart. You want every piece coated, but you do not want to mash the salad. At this point, season with salt and freshly ground black pepper to taste. Start light, stir, taste again, and adjust if needed. Pasta salad usually needs a little more seasoning after chilling, so it is fine to keep the salt slightly conservative at first.

5-Fifth Step: Chill the salad Cover the bowl and refrigerate for at least 30 minutes. This resting time helps the flavors blend and gives the dressing a chance to cling to the pasta. If you have extra time, chill it for 1 hour or more for an even better result. This is also a great make-ahead dish for picnics, potlucks, or weekday lunches. In fact, many home cooks find that macaroni salad tastes best after sitting overnight.

6-Final Step: Garnish and serve Right before serving, sprinkle the salad with 1 tablespoon parsley or chives, diced. This gives the dish a fresh finish and makes it look brighter on the plate. Serve it chilled for the best texture and flavor.