Whip egg whites with cream of tartar until frothy, add sugar bit by bit and continue whipping until the mixture has turned glossy and holds stiff peaks, similar to meringue. fold in the egg yolk mixture into egg whites being careful not to deflate. heat a non-stick pan, spray very little oil, scoop batter on the pan, cover let it cook for 4 minutes, uncover add some more batter on the top and cover cooking for a further 4 minutes, uncover, flip and cook for another 4 minutes.