Sift dry ingredients together. Make a well and pour in oil, milk, beaten egg and grated apples. Mix only until egg and grated apples are blended. Mix only until moistened. Spoon 3/4 of batter into well greased muffin tins. Sprinkle the following streusel filling over each, then top with 1 teaspoon batter. Bake at 350 degrees for 20 to 25 minutes.
1/4 cup brown sugar
1 tablespoon flour
1/2 tsp. cinnamon
1 tablespoon butter or margarine, melted
1/4 cup chopped nuts