Bring a large pot of salted water to a boil. Add the pasta and cook until just tender, about 8-10 minutes. Drain and rinse immediately with cold water to stop the cooking and keep it firm.
While the pasta cools, chop the celery, carrot, and cucumber into small, crunchy pieces. Thaw the frozen peas if frozen.
In a large mixing bowl, combine the cooked pasta, diced vegetables, and thawed peas. Gently toss to distribute evenly.
In a small bowl, whisk together mayonnaise, apple cider vinegar, sugar, and a pinch of salt until smooth and well combined.
Pour the dressing over the pasta and vegetables. Carefully fold everything together until the salad is coated evenly and has a creamy, colorful appearance.
Taste the salad and adjust seasoning with more salt or vinegar if needed. Chill in the refrigerator for at least 30 minutes to meld flavors.
Serve the Hawaiian Macaroni Salad cold, garnished with extra vegetables if desired, and enjoy its crunchy, creamy goodness.