so basically you're saying to un-oppress women, they should get back to the kitchen :-P (I'm kidding! I'm kidding)
it's an interesting theory, and as HCIdivision said, there's indeed Irish pubs, and (mainly in the US) also that whole St. Patrick's Day thing that does indeed put Irish in a good light.
but realistically, for women in tech, I don't think baking cookies is going to do the trick. however going with the Irish example, some general celebratory thing could be nice. even if it doesn't work, at worst, you'd have a great time? I've always been of the opinion that pretty much whatever you do with a group of people (be it a convention, a party, study, or work) just steadily gets better in many ways the more the gender ratio approaches 50/50.
out of curiosity, what is popular Jewish mainstream food? (I can't think of any, perhaps it's something that I forgot was originally Jewish)