In a mixing bowl, mash up the banana really well with a fork. Add the peanut butter, maple syrup and vanilla and mix well.
Add all the other ingredients (EXCEPT cacao nibs and banana chips) and coat well. If the mixture is too dry, add a bit of maple syrup. If it's too wet, add some more oats.
Transfer to a baking sheet lined with a silicon baking pad. Cook for about 45 minutes, gently stirring halfway through. After 30 minutes, keep an eye on it to make sure it doesn't burn.
Let cool completely before adding the banana chips and the cacao nibs/chocolate chips. Keep in an air-tight jar at room temperature.