Somehow I forgot to reply to this post of yours @LoyceV. Like I previously debated witihn some members[1], the rule regarding making yourself the pie exists for the purpose of preventing people simply go out into a store and buy them. If you do take part into the baking process alongside your wife - perhaps under her guidance? - the entry is still valid. Plus, it would be an awesome bonding moment I imagine! How about letting the kids decorate it? 
She says I'm too late 
Usually, she spend several days when she bakes a cake, and doesn't have that much time to spare before the deadline.I did have an idea though: it should look like this: BTC, but big enough for 12 people
