In a bowl, mix dry ingredients - whole wheat flour, baking powder, salt and cinnamon. Set a side.
In separate larger bowl, mash banana with a fork. Add Greek yogurt, honey or syrup, vanilla, and coconut oil. Mix until smooth.
Add in egg and mix until mixture is nice and smooth.
Add flour mixture to wet mixture and stir. Add sliced strawberries and stir lightly.
Line muffin pans with paper liners. Fill muffin cups with mixture, close to full. Sprinkle each muffin with oats.