Preheat the oven to 350 degrees. Spray a mini loaf pan with cooking spray.
In a medium bowl combine the flour, baking powder, salt, and lemon zest. Mix well and set aside.
In a large bowl cream together the butter and sugar.
Add the eggs and mix until well combined.
Stir in the yogurt and lemon juice and mix until smooth.
Depending on what version of the bread you are making, add in the extra ingredients and mix until combined. For the blueberries you will gently fold them in.
If you want to do like I did and make all three simply divide the batter into three portions and cut the extracts in half and the blueberries down to 1/3 cup.
Divide the batter between your mini loaf pans.
Bake for 30 minutes or until a toothpick inserted into the center comes out clean.
Remove from the oven and allow to cool in the pan for 10 minutes.
Run a butter knife around the edges of the pan and remove the mini loaves. Continue cooling on a wire rack.