How to prepare soft and fluffy Appams, Kerala style?

Ingredients needed for preparing Appams Kerala style 
4 cups Raw rice
1 cup  rice cooked
2 cups freshly grated Coconut
1/2 cup Coconut water
1/2 tsp Dry yeast
Warm Milk – ½ cup
3 tbsps Sugar
Salt to taste

How to prepare Appams, Kerala style? 
Clean and soak the rice for 4-5 hrs.
Grind  raw rice, cooked rice, coconut water and grated coconut together in a mixer / grinder to a smooth batter of dosa consistency.
In the mean time mix the yeast, 2 tbsp sugar in the warm milk and keep aside after 15 mins. The yeast will rise.
Mix the yeast mixture to the batterleave it to rise.
Before making appams, add salt to taste and sugar if needed. Stir well.
Heat a non-stick appachatti. Brush a little oil with a cloth.
Pour one big spoon of the batter into the appa chatti, rotate the pan gently holding it with both hands. Then close with lid.
When you see the steam coming out on the sides of the pan,, open the lid and remove appam.
Follow the same procedure till you finish the batter.
Serve hot.

Points to Note
You can serve appams with chicken stew / curry, vegetable / potato stew, or any other spicy curry you fancy.