Preheat the oven to 350°F.
In a glass baking dish (pie pan or similar) grease with coconut oil across the bottom and up the edges.
Sprinkle 1 tablspoon of sweetener across the greased pan. Tip and tap the pan to make sure that it is completely covered.
Place blueberries across the pan in an even layer.
Whisk eggs and remaining sweetener.
Add almond flour, unsweetened nut milk, salt, cardamom, and vanilla extract.
Mix well.
Pour over blueberries in the prepared dish.
Bake at 350°F for 45-50 minutes until risen and a toothpick inserted into the center comes out clean.
Once you remove it from the oven it will deflate.
Allow the clafoutis to cool slightly before serving.
Top with low carb powdered sweetener.