Topping:

1 c. sugar
1 c. flour
1/2 tsp. cinnamon
1 c. dark brown sugar
1/2 c. old fashioned rolled oats
8 tbsp. unsalted butter, melted and cooled

Filling:

6 tart apples, peeled and quartered
1 tbsp. fresh lemon juice
3/4 c. chopped pecans or walnuts
2 tbsp. sugar

Preheat oven to 400°F. Combine the dry ingredients with butter to make a coarse meal. In a glass deep-dish pie plate or baking dish combine apples, lemon juice, nuts and the remaining sugar. Sprinkle topping over fruit and bake at 400°F for the first 15 minutes. Then reduce heat to 350°F and continue baking for 25 minutes or until the top is golden brown.