Preheat oven to 340 F (170 C)
In a bowl, combine filling ingredients. Xanthan gum should be lightly sprinkled while mixing so that it’s evenly spread and doesn’t clump. Set bowl aside.
In another bowl, combine walnuts, coconut flour, flaxseed meal, 1/4 cup stevia, sea salt and toss together so it mixes evenly
Add plant butter and combine until the whole mix is crumbly
Set 1/2 cup of the crumble aside and the other 1 tsp sweetener to it
Grease a 9″ glass pie dish with butter, then press down the bowl of crumble. Use your hands to press it flat into the bottom
Pour the fruit mixture over the crust and spread evenly
Finally, sprinkle the remaining 1/2 cup of crumble over the pie
Bake for about 20 minutes covered with tinfoil, then a final 10-20 minutes until crumble is browned (this will prevent burning the crumble because this dish needs a little time to cook)
Once finished, let cool completely in the refrigerator (at least a few hours to set so it can be sliced and held like a pie), then serve. Enjoy!