Preheat oven to 350.

Grind oatmeal in food processor or blender until it is fine.

In a large mixing bowl, mash banana with fork.

Mix banana and peanut butter until smooth.

Add in oatmeal, reserving 1 tablespoon. Mix well.

Dust surface with reserved ground oatmeal. Roll dough out to about ¼ inch.

Cut desired shapes for the doggie treats.

Place cutouts on parchment paper lined cookie sheet.

Bake about 15 minutes or until edges brown.

Allow to cool.

While baking: Mix cornstarch, water, honey, and food coloring to make icing.

Drizzle or apply icing with pastry brush on cooled dog treats.

Store cookies in air tight container in refrigerator.