Mix sugar, coconut and crushed cardamom powder together and keep it aside.
Mix salt and flour and sift. Add egg and half cup of milk and mix into a smooth batter. Keep this aside for 30 minutes. Then add the remaining milk to the batter and mix well (like dosa batter).
Heat the shallow pan and grease it with little oil and pour three tablespoons of the batter. Cook both sides until brown. Repeat this for as many dosas you need. Fill the coconut mixture in each dosa and fold into triangles. Refrigerate this and serve it cold.