Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.

In a medium bowl, combine the steamed chopped broccoli, grated carrots, grated apple, and mashed blueberries.

Stir in the oat flour and water, mixing until a workable dough forms. Add an extra tablespoon of flour if the mixture is too wet.

Roll the mixture into small, bite-sized portions (about 1 inch in diameter) and place them on the prepared baking sheet.

Bake for 15 to 20 minutes, or until firm and lightly golden on the outside. Let cool completely before serving to children.