Melt butter, nut butter and honey in large saucepan. Mash bananas and add to saucepan. Once mixture is melted take off heat. Add oats, seeds, nuts, lemon & orange zest and mix together.
Place baking paper into baking tin and grease with coconut oil. Place mixture into tin and spread evenly, 1 inch thick.
Sprinkle seeds and drizzle honey over mixture to finish.