Preheat oven to 180ºC . Combine flour, baking powder, sugar, cheese, and scallions. Stir beer in gently to form a thick, sticky batter. Pour batter into greased loaf pan, 8- half x 4- half inches. Brush top of loaf with beaten egg and sprinkle with sesame seeds. Bake in oven for 1- quarter hours or until loaf browns. Remove from oven and cool on a wire rack.