Kneidlach – Ask the Rabbi
Q. Why do some people not have kneidlach (matzah balls) on Pesach?
A. Kneidlach are made by kneading matzah meal with liquid. Though this does not produce chametz, some impose upon themselves a chumra (a stringency), and refrain from anything of this kind.
To indicate that kneidlach are in fact not prohibited, many Chassidim eat them on the 8th day of Pesach.