In a large bowl, combine the apples, 1 tablespoon flour, sugar, lemon juice and 1/4 teaspoon cinnamon. Pour into a greased 9-in. deep-dish pie plate.
In a small bowl, combine the oats, brown sugar and remaining flour and cinnamon. Cut in butter until crumbly; sprinkle over apple mixture. Cover with waxed paper. Microwave on high for 5-7 minutes or until apples are tender. Serve with ice cream if desired.