You can use sprouted green gram instead of cooked cherupayar and follow the same recipe. You can also use a combination of sprouts.
You can add fruits & veggies of your choice, like cabbage, capsicum, green peas, baby spinach, lettuce, pomegranates etc; You can also add grated coconut, if you like.
You can also drizzle some extra virgin oil, if you like. You can use Amchoor (dry mango) powder or chaat masala to season the salad, for an added kick.