I have run into this a few times. I soak dry posole overnight, and then add it to my sweated/sauteed vegetables, add water, and stir it regularly, and it still takes over 4 hours for the kernels to pop. Is there a part of the process I am missing or doing wrong, or could I just be dealing with old posole?
Posole is essentially Nixtamalized Corn, or hominy.