Start by boiling water in a cooking pot and adding the elbow macaroni. After about 8 minutes, the pasta should be al dente – firm to the bite. Rinse it under cold water immediately to stop the cooking process.
In a large bowl, add the hearts of palm and chickpeas. Use a fork to gently break up the hearts of palm until it resembles flaky tuna. Be careful not to mash it too much to avoid a mushy texture.
Toss in the chopped green onions, celery, diced bell peppers, green peas, and grape tomatoes. Stir everything to distribute evenly. The mixture should look colorful and fresh.
Squeeze in the lemon juice, then add the reserved cashew mayo, chopped seaweed, black salt, and Dijon mustard. Stir until everything is well-coated without over-mixing to maintain texture.
Add the chopped parsley and gently fold to incorporate it. Avoid vigorous stirring to keep the chickpeas intact for the preferred texture.
Let the salad chill in the fridge for about an hour before serving. This allows the flavors to meld beautifully. Check the salad after an hour to prevent excess moisture absorption.