Sift together the flour, 1.5 tsp. sugar and the salt in a large mixing bowl.Add beer and stir until smooth.Beat in one yolk,then the other.In a separate bowl,beat whites with 1 tablespoon. sugar until they form peaks.Fold into the batter.Mix together the remaining sugar, light brown sugar and cinnamon,reserving 2 tsp.of this mixture. Squeeze lemon over the apples and toss with sugar-cinnamon mixture until coated.Heat the butter and oil in a 9 to 25 cm oven proof pan or skillet.Pour in half of the batter and cover with all apples.Pour in the rest of the batter and bake in a preheated 350 degree oven,on the middle rack,for 60 minutes or until the apple pancake is puffed up and golden.To serve,loosen sides and bottom with a metal spatula, sliding onto hot plate.Sprinkle with remaining sugar-cinnamon mixture. Cut into wedges.Serves 2 generously.