Soak the moong dal in clean water for 20 minutes.
After soaking, drain and rinse the dal in a mesh strainer under cold running water to remove any impurities.
Spread the dal on a baking pan and carefully check for any pebbles or foreign matter.
Put the moong dal, water, turmeric, dried chilies, and fresh minced chili in a pot and bring it to a boil over high heat. Once boiling, continue to cook for 6 minutes to start softening the dal.
Add chopped ridge gourd, sugar, and salt to the pot. Cover the pot and lower the flame to a simmer. Add additional water if it is running low. Cook for 10-15 minutes until the peekangai and dal are soft.
While the dal is cooking, use a spice grinder or blender to grind coconut, chana dal, cumin, and peppercorns into powder.
Once the contents of the pot are soft, stir in the ground spices.
Prepare the tadka in a separate pot. Heat coconut oil in a saucepan over medium heat. After 60 seconds, add mustard seeds, urad dal, cumin seeds, asafoetida, dried chilies, ginger, and curry leaves. Lower the flame to low, and allow the spices and dal to slowly release their flavors into the hot oil for ten minutes.
To serve, transfer the kootu to an attractive serving bowl and spoon the tadka on top. Garnish with fresh cilantro leaves.