Whisk ricotta cheese and milk to form a smooth cream. Add the eggs and whisk until incorporated.
Combine flour, yeast and a pinch of salt, add them to the ricotta and eggs mixture and whisk gently to get a homogeneous batter. Add the parsley, if using, then set aside.
Heat a non-stick frying pan with a little olive oil. Add ¼ cupfuls of pancake batter and cook until bubbly on top and golden on the bottom.
Turn the pancakes and cook one minute more. As they are done, stack them on a plate so they will keep warm while you go on cooking.
Note
These healthy protein pancakes are great as a sweet, too; just omit parsley and try them for breakfast or afternoon treat served with maple syrup, fresh fruit, jam or hazelnut spread.