Start by adding curd, sugar, pinch of salt and egg to the mixing bowl and mixing them well with a fork.
Add flour to the mix and start mixing the dough with your hands. The dough should be soft and fluffy, not too hard and not too sticky. If it's sticky add more flour. If it's too hard add another egg.
Spread some flour on a cutting board and form two long stripes of dough. Cut the stripes with a knife, into small squares.
Add the curd dumplings to a pot of boiling water and cook until they rise to the top. It shouldn't take more than 5 minutes.
At the same time prepare your sauce. Firstly add the butter to another pot and let it melt on low heat. Once it's fully melted add you sour cream, salt and cook for 2 more minutes.
Finally put the dumplings into the serving dish and add the sauce on top.