I have this organic peanut butter I've found which is literally just ground up peanuts...

its good on toast, but i also eat it on celery!

i've no idea about in cooking, but peanuts and peanut butter (with no added sugar and the rest of it) are fine on Montiganc - but they do tend to be high in fats. because of this I limit them and stick to other types of nuts to munch on.

sorry i can't be of any more help!