Preheat oven to 375F.
Spray an 8 by 8-inch baking dish with non-stick cooking spray.
Place strawberries in a large bowl and toss with balsamic vinegar.
In a small mixing bowl, whisk together flour and 1 tablespoon light brown sugar until incorporated.
Add the brown sugar mixture to the strawberries and gently toss to coat. Pour berry mixture into the prepared baking dish and set aside.

Topping
In a medium bowl, whisk together flour, oats, brown sugar, baking powder, vanilla, and salt.
Using your fingers, mix cold butter into the flour/oat mixture until the mixture resembles coarse crumbs.

Sprinkle mixture over strawberries in baking dish.
Bake for 30 to 35 minutes, or until the top is golden brown and fruit is bubbling.
Remove from oven and allow to cool slightly.
Serve warm or cold with whipped topping.