Preheat oven to 375°.
Lightly spoon flour into a dry measuring cup; level with a knife. Combine flour, oats, 2 tablespoons sugar, sliced almonds, and oil in a small bowl, stirring until blended.
Combine remaining 3 tablespoons sugar, cornstarch, and remaining ingredients except cooking spray in a large bowl. Toss gently to combine. Spoon fruit mixture into an 8-inch square baking dish coated with cooking spray. Sprinkle with oat mixture. Bake at 375° for 35 minutes or until bubbly.