first of all i just wanted to say that i love kitchri, and i think kitchri and koftay are a wonderful combination :)
ok, here's my kitchri recipe (I'm not sure how many people you intend to serve):
for every 1 cup of masoor ki daal, use 2 cups of rice (so its always a 1:2 ratio), if you like more daal then by all means add more daal...
make sure the daal is cleaned (no stones etc...) and mix the dry ingredients together (daal and rice) and wash it, set it aside in water and allow to soak
next cut a medium size onion in slices and fry in oil in a pot. by the time the onion has been fried, the rice has been soaked.
put the rice/daal mixture in the pot of onions and add water (lets say you have 3 cups of daal/rice together, add an extra cup of water = 4 cups of water, i usually just add an extra 1/4 cup of water, but however you normally make rice, use that method).
next put a tsp of salt for every cup of daal and rice.
put it on high heat, when it starts boiling, stir, reduce, cover and simmer...
now everyone's kitchri recipe may be different, so i'm sorry in advance if this is not the way your mom makes it.