Dry roast oats,let it cool and then make powder in a mixer jar.

Till it cools,boil 1 cup milk,add 1 tablespoon fresh lemon juice,let it cuddle. Then remove water and keep it aside.

Remove the skin and grate boiled potato.Now in a kadai add oil, let it heat,then add cumin seeds, as they splutter, add green paste and saute to remove it's rawness
Now add boiled - grated potato,add salt,garam masala,mix it well and let it cook for few more minutes.

Transfer this potato mixture to a plate and let it cool, by the time take sabudana in a plate,add oats powder, chena,salt cumin powder, chopped green chilli, curd and mix and form a dough.

Now take 3 small mugs / cups / glass of steel whatever is available. Grece it with oil. Take small portion of sabudana mixture,flatten it and place at bottom of the cup,make tikki of potato mixture place on it and place sabudana flatten ball on it.

Now take a pan with flat bottom, add water to it,put a stand on it and a plate on the stand,let the water boil,then put all the prepared cups on it,cover with lid and cook on steam for 10 minutes.

Then take out the cups and demold on a plate,serve with curd / chutney.