Mix almond flour, granular sweetener and butter together until pea sized crumbs form. Press about 2 Tbsp mixture into the bottom of two 4oz ramekins.
Bake just until lightly browned, about 15 minutes
For the filling
Put butter, berries and sweetener in a heavy bottomed pot over medium heat until butter melts and berries begin to cook (time will depend on whether your berries are fresh or frozen but about 5-8 minutes is likely enough)
Add a squeeze of fresh lemon juice and sprinkle xanthan gum over berries.
Add gelatin if using and cook until reduced a bit and thickened.
Spoon berries over pre-baked crusts and pop back into the oven for about 10 minutes. (this step is likely not actually necessary)
Serve with heavy whipping cream sweetened with a few drops of liquid stevia.