Cook Pasta: Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente, usually about 8-10 minutes. Drain and rinse under cold water.

Combine Ingredients: In a large mixing bowl, gently toss together the cooled pasta, diced pineapple, optional diced ham, red bell pepper, grated carrot, grated red onion, and sliced green onion.

Prepare Dressing: In a separate bowl, whisk together the mayonnaise, pineapple juice, apple cider vinegar, and optional sugar until smooth. Adjust with salt and pepper as needed.

Mix Dressing with Salad: Pour the creamy dressing over the salad mixture. Gently fold to coat everything evenly, being careful not to break the pasta or pineapple.

Chill and Serve: Cover the bowl and refrigerate for at least 30 minutes. Before serving, give it a gentle toss and enjoy.