Preheat oven to 350°F and line a baking sheet with parchment paper.
Cook apples: Heat diced apples with maple syrup, cinnamon, lemon juice, and salt for 6–8 minutes until softened.
Make dough: Mix protein powder, honey, oat flour, oats, and Greek yogurt until thick and wet.
Combine: Fold in the apples and blueberries. Scoop into 12 cookies and place on the baking sheet.
Bake for 12 minutes.
Notes: Don’t over-bake. Pull them out while still soft. If overly dry add a splash of milk. If overly wet add a bit more oat flour.
