Preheat oven to 350°F (175 degrees C). Lightly grease an 8 inch square pan.

In a large bowl combine brown sugar, oats, flour and butter. Mix until crumbly. Place half of crumb mixture into bottom of pan.

Sprinkle apples with white sugar, cinnamon and nutmeg and mix well. Spread the apples evenly over the crumb mixture and top with the remaining crumb mixture.

Baking in preheated oven for 40 - 45 minutes, or until golden brown.