Set the oven to 350º
Mix the flour, baking powder and salt in one bowl and set aside.
Add the egg to the second bowl and mix until the egg is light and fluffy.
Add sugar and mix rigorously until the mixture is thick. About 30-45 seconds.
Add melted butter and mix until well combined.
Add the sour cream (or yogurt) until well combined.
Add the juice from the lemon and ginger. Mix everything together.
Mix the wet and the try ingredients together until well combined.
Fold in the blueberries. Be careful here to not smash the blueberries.
Add batter to baking cups. The batter will be sticky.**
Bake for 25-30 min or until cooked throughout.***