In a large bowl, mix together chopped rhubarb, chopped strawberries and agave nectar.
Pour into a large cast iron pan [or any other baking dish you prefer]. Set aside.
In a smaller bowl, mix together oat flakes and brown sugar.
With your fingers, gently cut in butter into the dry mixture.
You don’t need very much of it, just enough to bring the whole topping together.
Pour over fruit and bake for about 40 minutes.
Fruit will become tender and slightly bubbly and the topping with be nicely toasted.
Serve hot out of the oven and enjoy!