Mix oat, bananas, butter, egg, milk and any optional ingredients.
Use a spoon to place little lumps on the tray.
Flatten lumps into cookie form with the back of the spoon.
Slice strawberries or any other fruit then place the slices on top of each cookie. Strawberries will shrink and change color in the oven to the extent we won’t win any visual award with them.
Put tray into the preheated 356°F / 180°C oven for 15 minutes to bake. Take the cookies out when they are golden brown.