Preheat your oven to 180C(fan)/200C(electric)/400F/Gas mark 6.
Mix the two ingredients until combined. The mixture should be easily spoonable.
Line a baking sheet with baking paper and drop spoonfuls of the fruit and oat mixture to form the cookies. You should get around 4 or 5 pieces.
Bake for 15 minutes. Leave to cool down.
Here are some fruits that work well to try besides banana, you could even mix them together!
Banana
Apple
Pear
mango
pumpkin
squash
strawberries
raspberries
peach
passion fruit
apricot