Soak moong dal: Rinse moong dal, or split yellow lentils or hesarubele a couple of times in cold running water, and then soak them in fresh water for 2 hours. After that, drain the water and transfer moong dal to a mixing bowl.
Add diced cucumber, grated carrot, grated coconut, chopped coriander leaves, salt, and lemon and mix together.
Prepare seasoning: Heat coconut oil in a small pan on medium heat. Then add urad dal and fry until golden brown. Add mustard seeds, green chilies, hing, and curry leaves, and allow the mustard seeds to pop.Turn off the heat. Pour seasoning over kosambari: Pour the prepared seasoning over the kosambari mixture and gently mix. Taste and adjust salt if necessary. Serve: Serve healthy and delicious kosambari or moong salad as a side dish with your meals, or enjoy it on its own as a salad.