prepared baking dish.
arrange the remaining berries, walnuts and chocolate on top.
add the banana slices to the top then pour the milk mixture over everything.
slice the banana length wise (so it's like a banana sandwich).
spread about a tablespoon or so of the butter on the inside of both banana slices.
cover the outside of the banana with the coconut.
wrap in wax paper and then in plastic wrap.
place in the freezer at least overnight.
i make a bunch of these a week and then every morning put one in my lunch bag. by the time i get to work and settle in, the banana is still plenty cold but has also warmed up enough 