G.W.
Lots of people mentioned things that we do with tofu, bake, stir-fry, etc. - my boys both LOVE IT! but no one has said yet - for a 12month old - just dice it and give it to him plain! It's bland for most adults but babies don't care and then you don't have to cook it and he's not getting oil etc.
When he is older - or for yourself . . . we like baking it like others have mentioned but with soy sauce on it vs. oil , my son calls them "golden nuggets"
also, although I have not done research on the "feminizing" effects, I know that millions of men in Asia eat soy all the time and are fine. We drink soy milk, have tofu once or twice a week and soy burgers about once a week too.