Rinse 1/4 cup moong dal well and add it to a pressure cooker.
Add water till immersing level.
Place 2 potatoes cut into half, inside a bowl, add water to it. Place it inside like shown.
Close with a lid.
Pressure cook in medium flame for 3-4 whistles.
Open and remove the lid. Place the bowl containing potatoes aside.
Mash dal well and set aside.
Mash potatoes roughly. Now moong dal and potatoes are ready.
To a mixer jar add 1/2 cup coconut, 2 nos garlic, 2 small green chillies, 3 tablespoon fried gram dal, 1/2 teaspoon fennel seeds along with little water.
Grind it to a slightly coarse paste. Set aside.
In a pot heat 1 tablespoon oil - add 1 one inch cinnamon, 2 smallcloves, a small piece stone flower, 1 small bayleaf, 1/2 teaspoon fennel seeds and few curry leaves. Give a quick saute.
Add onion, along with required salt fry until transparent.
Add 2 tablespoon chopped tomatoes saute until mushy.
Add 2 cups water and let it boil for 2 mins atleast.
Now add coconut paste.
Rinse mixer with 1/2 cup water and add it.
Boil for 5-7 mins or until raw smell leaves.
Give a quick mix and simmer.
Now add roughly mashed potatoes.
Add mashed moong dal.
Give a quick mix. Adjust consistency if its too thick add little more water. Mine was apt so did not add water. Let this cook for another 5 more mins.
Finally garnish with 1 tablespoon coriander leaves and few curry leaves. Give a quick mix and switch off. Kumbakonam Kadappa will thicken with time so switch off when it is still runny.