Pesahim 40a and Pesahim 40b, on whether we may/should/must soak grains to clean them, the issue of shemurah matzah (and at what point in the process it starts), and what kinds of mixtures might stop flour from leavening.
Pesahim 40a and Pesahim 40b, on whether we may/should/must soak grains to clean them, the issue of shemurah matzah (and at what point in the process it starts), and what kinds of mixtures might stop flour from leavening.