Knead the dough using the ingredients as mentioned for it. Be cautious about the amount of water. Go for less if needed.
Now, mix the ingredients for the filling and make a smooth paste out of it using the mustard oil.
Pinch off small balls of the dough and flatten them between your palms. Keep the centre thick while pressing the edges thinner.
Take a teaspoonful of the filling and keep it at the center of the flatten dough ball. Gather the edges together and pinch them so that the filling is neatly tucked in.
Now, roll it into a flat disc and deep fry it. Repeat it with the rest of the dough and filling till you get your kochuris.