In a medium bowl, mix together berries, lemon juice and cornstarch. Add to buttered or greased 8x8 or 9x9 baking dish.
In the same bowl, mix together oats, pecans, almond meal, coconut flakes or chips, cinnamon, butter or coconut oil, and maple syrup or honey. Mix until mixture comes together and add to top of baking dish.
Bake for 25-30 minutes, until the top has lightly browned and the filling is beginning to thicken. Let rest for 15-20 minutes before serving to allow the filling to thicken. Serve warm with whipped cream or ice cream.
*If using frozen berries, increase cornstarch to 4 tablespoons to account for the extra liquid the berries will release during cooking.**I bought just the right amount of organic cornstarch in the bulk bins at Whole Foods for something like $.20.