Whisk the eggs in a bowl. Add the yogurt, lime juice and vanilla extract.
In another bowl mix the flour, baking powder and bicarb.
Add the flour mixture to the wet, whisking until combined. It should be thicker than normal pancake batter. Mix in the lemon zest.
Using a small ladle, add dollops of the batter to a lightly greased griddle pan - gently spreading the thick batter into rounds.
Cook over medium heat until the top of the pancakes is almost set - this should take about 2 to 3 minutes. Flip and cook them until golden brown on the other side too.
Repeat with the remaining batter.
Serve warm or at room temperature.