In a blender, add the milk, melted butter, eggs, flour, and salt. Blend until smooth and let the batter rest for at least 30 minutes.
In a separate bowl, mix ricotta, sugar, lemon zest, and lemon juice until well combined. Set aside.
Heat a non-stick skillet over medium heat. Lightly butter the surface. Pour about 1/4 cup of batter into the skillet, tilting to cover the bottom with a thin layer.
Cook for about 1-2 minutes until the edges begin to set. Flip and cook for another 1 minute. Remove to a plate and keep warm. Repeat with remaining batter.
For the blueberry compote, add blueberries in a small pan over medium heat. Cook until the blueberries are soft and syrupy.
Spoon ricotta filling into each crepe and fold into quarters or roll up. Serve with blueberry compote and a dollop of whipped cream.