Preheat oven to 400. Prepare a 8" square pan with cooking spray; set aside. To prepare crust, combine sugar, oats, margarine, flour, and one teaspoon cinnamon in a mixing bowl until crumbly. Reserve one and half cups. Press remainder into prepared pan; set aside. To prepare filling, combine remaining cinnamon and strawberry pie filling in a mixing bowl. Spread over crust. Sprinkle reserved crumbs over top, pressing in lightly. Bake for 25 minutes, or until lightly browned. Cool. Cut into squares and serve.