Heat your oven to 350 degrees.

Grind the flax seeds and add to 3 tbsp. warm water in a bowl. Stir well, and sit aside for about 5-10 minutes.

Mash the bananas in a large bowl. Add the oats, vanilla, peanut butter, marshmallows, and flax mixture, and stir well. Fold in the chopped walnuts and chocolate chips.

Place spoonfuls of batter onto a prepared baking sheet and bake for 10 minutes or until the edge of the cookies brown.

I'm sure the cookies will keep for a few days but why the hell wait - they are delicious...so eat them, without fear, and savor every bite.