Preheat oven to 175 C. Grease and flour a round baking pan. Prepare the topping by combining brown sugar, cinnamon pwd and maida
well. Cut the butter into this mixture using a fork until it appears crumbly. You can also add a few tbsps of chopped walnuts. Keep aside.
Sieve maida, baking pwd and salt in a bowl.
In another bowl, cream butter and sugar. Use a hand blender to make a smooth creamy mixture. Add the beaten eggs and combine well. Add cinnamon pwd and combine.
Fold in the maida mixture little by little alternating with milk. Do not over beat, just fold the dry till there is not trace of any flour.
Pour batter into the greased and floured pan. Smooth the top using a spatula. Arrange the apple slices on top. Sprinkle the streusel topping liberally. Bake in preheated oven for 1 hr or till a toothpick inserted into the cake comes out clean. Place on a wire rack to cool, slice and serve at room temperature.