Mash the banana.
Add a large handful of oats.
Drizzle in a little honey.
Add nut butter.
Add a small handful of chopped nuts.
Mix together and spoon a tablespoon for each cookie of the mixture onto a greased non-stick baking tray, flatten each cookie a little and allow space for the cookies to spread during baking.
Bake at 180' for 12 to 15 minutes.
Cool and serve.