What food related things will you spend some of those millions on - and how will you endow Serious Eats?
I'd need a new kitchen in a new house for starters. Probably hire a private chef - or better yet, hire a pile of chefs for a week at a time in exchange for a healthy donation to a charity of their choice.
Vermont is moving in some interesting directions in the food world, and I'd want to spend to encourage more of that - growing cooperatives, communal cheese caves, sustainability, etc.
I'd want to find a way to pay for pet food for some of those who suddenly find they can't support their pets.
And for all those currently registered on Serious Eats, a copy of Kenji's book when it comes out.
How about you?