01 - In a small saucepan, combine blueberries, sugar, water, and lemon juice. Simmer over medium heat, stirring occasionally, until berries burst and syrup thickens slightly, about 8 to 10 minutes. Remove from heat and set aside.
02 - In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
03 - In a separate bowl, blend ricotta cheese, milk, egg yolks, lemon zest, lemon juice, vanilla extract, and melted butter until smooth.
04 - Add the wet mixture to the dry ingredients and gently stir until just combined. Avoid overmixing to maintain light texture.
05 - Beat egg whites in a clean bowl until soft peaks form. Fold gently into the batter until incorporated to enhance fluffiness.
06 - Heat a nonstick skillet or griddle over medium heat and brush with butter. Pour 1/4 cup batter per pancake onto skillet. Cook 2 to 3 minutes until bubbles form and edges set. Flip and cook 1 to 2 minutes until golden and cooked through. Repeat with remaining batter.
07 - Serve pancakes warm, topped with blueberry syrup.