Whats the easiest thing I can make fast and cheap to feed my red eye tetra fry?

I have a pregnant red eye tetra ( I think becuz there is a big lump in her belly and it doesn't look diseased). When the eggs are laid Im planning to remove them and put them in a seperate tank with the same water and all that, but what is the easiest fastest thing to feed them (by fastest I mean the fastest to make and get...etc, becuz I am pretty far from the nearest pet store