Pre heat oven to 325 F
Clean beaters and bowl with lemon juice to make sure there is no fat on them
Whip egg whites, egg white powder, sweetener, and gelatin to stiff peak
Add the lemon extract and lemon juice and mix well
Add the egg yolks and mix well
Spoon mixture into 12 muffin tins to half full
Place blueberries on muffins
Fill the rest of the muffin mixture over the blueberries
Place a few blueberries on top of the muffins
Bake at 325 F for 20-25 minutes depending on the heat of your oven
Turn off oven and let the muffins sit in the oven for 1/2 hour
Remove muffins from oven and let cool
Remove the muffins from the tin and enjoy