4 cups apples, peeled and sliced
2 cups plums, pitted and sliced
1/2 cup margarine, melted and divided
1 Tbsp. lemon juice
1 Tbsp. flour
3/4 tsp. cinnamon, divided
1 cup oats
1/4 cup nuts, chopped
1/4 tsp. ground ginger
1/2 cup brown sugar, firmly packed, divided