Preheat the oven to 350F. Line a 1/2 sheet baking tray with parchemnt paper.
Place oats in a blender and blend for 1 minute to obtain a flour texture.
Add in the blender all the remaining ingredients: bakign powder, cherries, banana, egg, coconut oil, milk. Blend into a thick smooth cream.
Fill half of a plastic bag with the mix, close it and cut a tiny tip from the bottom corner.
Pipe the mix in small dots on the parchment paper. Fill the whole paper with dots.
Bake to 350F for 10 minutes. Reduce the heat to 275F and keep bakign for 15 minutes. Remove from the oven, let it cool down 5 minutes and with your fingers remove the puffs from the paper. They will come out easily. You should be able to bake 3 trays of puffs with the suggested quantities.