1: In a bowl, mix oats, almond flour, lemon zest, and baking powder.
2: Add skim milk or soy milk and juice from 2 lemons.
3: Pour the mixture into a baking pan and bake until cooked through.
4: For the frosting, mix the juice of 1 lemon with sweetener and skim milk or soy milk.
5: Spread the frosting over the cooled cake and serve.
