In a large stockpot, cook the elbow macaroni according to package instructions.
If you haven't hard-boiled the eggs yet, do so now. I pressure cook them in Ninja Foodi or Instant Pot, but if you don't have a pressure cooker, use this method: In a separate pot, place the eggs and cover with water. The water should be about an inch above the top of the eggs. Bring to a full boil, then turn off the heat, cover, and let the eggs sit in the hot water, covered, still on the same (now off) burner, for 10 - 12 minutes. Drain and peel.
Meanwhile, prep the ingredients: shred the rotisserie chicken meat, shred the carrots, slice the celery, dice the red onion, chop the pickles, and chop and slice the hard-boiled eggs.
When the pasta is cooked, drain the water with a strainer and then allow cool water to pour over the cooked pasta for a minute, to cool it down a bit.
In an extra large bowl, add the cooled pasta. Stir in the mayonnaise to coat the pasta evenly. Then stir in the chicken, pineapples, carrots, celery, red onion, dill pickles, and the chopped eggs.
While you can eat the macaroni salad immediately, it's best to allow the salad to cool in the refrigerator for at least 30 minutes. This will help all of the flavors happily mingle together and create an even flavor throughout the pasta salad.
Serve this macaroni salad cold, garnished with chopped parsley and slices of the remaining hard-boiled egg.
Additional mix-ins: traditional Filipino macaroni salad contains raisins. Feel free to add raisins if you wish. Nobody in my house likes raisins, so we leave them out. You can also add: shredded cheddar cheese, diced ham, mustard, white vinegar, or diced yellow onions. How to store Filipino macaroni salad: this salad is best eaten within a couple of days, but you can keep it in an airtight container in the refrigerator for up to five days. When you're ready to eat the leftovers, try adding some mayonnaise to the macaroni salad to "wake up" the ingredients and flavors before serving.NOTE ABOUT NUTRITION VALUES: The nutrition for this recipe is calculated by our nutritional calculator based on general dairy-free ingredients. The exact nutritional value will be different based on the specific brands and ingredients you use.