In a large mixing bowl, whisk together the ricotta cheese, egg whites, whole egg, Greek yogurt, lemon juice, and vanilla extract until the mixture is smooth and creamy.
Gently stir in the fresh lemon zest to distribute the citrus oils throughout the batter.
Add the oat flour, baking powder, and sea salt to the wet ingredients, mixing until just combined to ensure the pancakes remain light and airy.
Heat a large non-stick skillet or griddle over medium-low heat and lightly coat the surface with avocado oil.
Scoop approximately 1/4 cup of batter per pancake onto the hot skillet, leaving space between each for easy flipping.
Cook for 3 to 4 minutes until small bubbles form on the surface and the edges appear set.
Carefully flip the pancakes and cook for an additional 2 minutes until they are golden brown and cooked through.
Serve the pancakes warm with a light drizzle of maple syrup.