01 - In a small bowl, gently toss the mixed berries with 1 tablespoon sugar and lemon juice. Set aside to macerate while you prepare the pancakes.
02 - In a large mixing bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
03 - In another bowl, combine ricotta cheese, milk, melted butter, egg yolks, lemon zest, and vanilla extract. Mix until smooth.
04 - Add the ricotta mixture to the dry ingredients and mix gently until just combined (do not overmix).
05 - In a clean bowl, beat egg whites until soft peaks form. Gently fold the whipped egg whites into the batter until incorporated.
06 - Heat a nonstick skillet or griddle over medium heat and lightly grease with butter.
07 - Pour about 1/4 cup of batter per pancake onto the skillet. Cook for 2–3 minutes until bubbles appear on the surface and edges look set. Flip and cook for another 1–2 minutes until golden and cooked through. Repeat with remaining batter.
08 - Serve pancakes stacked on plates, topped with the macerated berries and a drizzle of maple syrup or sprinkle of powdered sugar, if desired.