Method
1. Add egg whites to a clean medium bowl
2. Whisk until light and fluffy
3. Add ricotta cheese, egg yolk, brown sugar, milk, lemon and lemon to a clean large mixing bowl
4. Whisk briefly until blended
5. Sift all-purpose flour and baking powder into a clean small bowl
6. Add salt
7. Mix dry ingredients into batter until combined
8. Fold egg whites into batter bit by bit
9. Heat a clean frying pan - medium heat
10. Grease with butter generously
11. Fry batter in frying pan
12. Serve immediately