In a food processor process the oats until they are fine.

add in the banana, peanut butter and egg and coconut oil, process until all combined.

(you can heat the coconut oil slightly to make the mixture easier to manage)

Roll out dough between wax paper, add a little cornstarch is the dough is sticky, it's the consistency of playdough, so it will come together if you knead it a few times before and in between rolling and cutting the cookies.

Cut with desired cookie cutter.

Place on a parchment-lined baking sheet.

bake at 350 degrees for 20 minutes, the bottoms will become crisp which is great for a crunchy dog treat.