Preheat oven to 400 degrees. Place paper liners in muffin tins and set aside.
In a large bowl, whisk flour, baking powder, nutmeg, cinnamon and salt; set aside
In a separate bowl, whisk together melted butter, sugars, eggs, vanilla, yogurt and mashed bananas until well incorporated.
Add dry ingredient mixture to wet mixture with a rubber spatula and mix just until combined. Fold in nearly all of the blueberries--reserving just a few
Divide batter evenly among prepared muffin tins. Fill each tin all the way to the top to achieve a nice dome when baked. Place a few extra blueberries onto the top of muffins and sprinkle with turbinado sugar,
Bake for 18-24 minutes until tops are puffed up and a toothpick inserted into the middle comes out with only a few moist crumbs.
Remove from oven and cool in pan on wire rack for 5 minutes. Carefully remove from pan and allow to cool completely on rack.
Store tightly covered at room temperature for up to 3 days, or freeze for up to 3 months.