Lemon Crepes With Sweetened Ricotta
In a blender, blend the milk, eggs, flour, butter, salt, lemon juice, and 1 tablespoon of the sugar until very foamy, about 1 minute. Transfer to the refrigerator and let rest, at least 30 minutes and up to 1 day.
Meanwhile, in a medium saucepan, boil ½ cup of water and the remaining ½ cup of sugar, stirring, until the sugar dissolves. Add the lemon slices and simmer until tender and translucent, 5 to 7 minutes; let cool.
Wipe a medium nonstick skillet with butter and heat over medium heat. Add ¼ cup of the crepe batter and swirl the skillet so the batter completely covers the bottom of the pan. Cook until golden brown, 2 to 3 minutes. Gently loosen the edge of the crepe with a spatula and, using your fingers, flip the crepe. Continue to cook until cooked through, 1 to 2 minutes more. Transfer to a plate. (Don’t be disappointed if the first crepe does not come out well; the batter makes enough for 13.) Repeat with the remaining batter.