Preheat oven and line tin:
Set oven to 350°F (175°C). Insert paper liners into a muffin tin.Mix dry ingredients:
In a large bowl, mix rolled oats, whole wheat flour, baking powder, baking soda, and cinnamon.Blend wet ingredients:
In another bowl, blend applesauce, Greek yogurt, maple syrup, and egg until uniform.Combine and fold in blueberries:
Add wet mixture to dry ingredients; stir until barely combined. Carefully fold in blueberries.Fill muffin cups:
Distribute batter equally among the muffin cups.Bake until done:
Bake for 18-20 minutes, until a tester inserted in the center emerges clean. Let cool before serving.