Place berries in bottom of pie plate and sprinkle with a teaspoon (or so) of sweetener. Set aside.
In medium bowl, place meal, sweetener, butter, cinnamon, and vanilla. Cut together with fork until a dough is formed. Cut or stir in pecans until well incorporated.
Using your fingers, pinch off bits of topping and place all over top of berries. Bake at 350 for 30 minutes or until lightly browned.
Serve with heavy cream poured over the top (in place of ice cream), if you like, or on it's own.