1: Preheat the oven to 180°C (350°F).
2: In a bowl, mix the egg, yogurt, monk fruit, and coconut oil until well combined.
3: Add the lemon juice and zest, and mix again.
4: In another bowl, combine the almond flour, baking powder, and vanilla.
5: Gradually add the dry ingredients into the wet mixture until well mixed.
6: Pour the batter into a greased cake mold.
7: Bake for about 25 minutes or until a toothpick comes out clean.
8: Let it cool before serving.
