Put the flour, salt, eggs, and milk in a bowl and beat at medium speed until blended. The mixture will be a thin batter.
Prepare a non sticking pan of desired size by melting a small amount of oil or shortening to cover the bottom (the fat should be hot). Pour a scant 3 Tablespoons of batter into the pan, tipping it so that it coats the bottom. Sprinkle all over with 1/2 Tablespoon currants. Cook the first side until it is a golden brown. Turn the crepe with a spatula and cook the other side.
Turn the crepe out onto a large plate, sprinkle with sugar and lemon juice, and roll up.
Crepes can also be piled up and sliced in portions like a cake. Continue with remaining batter. Keep crepes warm in a 200°F oven. This recipe will make a dozen or more.