Method: First, sift flour and salt into mixing bowl. Add the egg and milk.Next, whisk till smooth. Set aside for 1 hour. Later, gently heat a 20 cm frypan. After, pour butter in to jug.After that, pour about 3 tablespoons into a pan. Next, lift edges with a knife.When golden, flip it over and cook the other side. Then, place on kitchen paper. Sprinkle lemon and sugar over. Finally, roll up and serve hot with whipped cream or ice cream if you like.