Stir together cornmeal, baking powder and salt. In a 1 litre casserole dish pour: beaten eggs and melted butter. Heat milk until it starts boiling, being careful not to scorch it. sprinkle in the dry ingredients, stirring vigorously with wooden spoon. Cook and stir for 2 or 3 minutes, as it thickens, mix with eggs in casserole. Bake 220ºC or 45 minutes. Serve From casserole with a spoon. Add butter. Eat with fork.