Mix the egg and sugar together.Add milk, oil and vanilla. Mix well.Stir in the flour, salt, baking powder. Fold in the apples.Spread in one greased loaf pan. Mix the flour, brown sugar, butter and cinnamon together.Sprinkle over the apple batter.Bake in a 375* oven for 45 minutes or until toothpick inserted into the center comes out clean.