01 - Combine blueberries, sugar, water, and lemon juice in a small saucepan. Simmer over medium heat, stirring occasionally, until berries burst and syrup slightly thickens, about 8–10 minutes. Remove from heat and set aside.
02 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large bowl.
03 - In a separate bowl, mix ricotta cheese, milk, egg yolks, lemon zest, lemon juice, vanilla extract, and melted butter until smooth.
04 - Gently fold wet mixture into dry ingredients until just combined; avoid overmixing.
05 - Beat egg whites until soft peaks form. Carefully fold them into the batter to add lightness and fluffiness.
06 - Heat a nonstick skillet or griddle over medium heat and brush with butter. Pour 1/4 cup batter per pancake. Cook 2–3 minutes until bubbles appear and edges set, then flip and cook 1–2 minutes more until golden and cooked through. Repeat with remaining batter.
07 - Serve pancakes warm topped with blueberry syrup.