Step 1

Pulse flax seeds in a coffee grinder until finely ground.

Step 2

Combine 1 can coconut milk, blueberries, and lemon juice in a blender; puree until blueberry skins break down completely. Add ground flax seeds, remaining coconut milk, vanilla extract, coconut oil, stevia, xanthan gum, and salt; puree until very smooth.

Step 3

Transfer blender container to the freezer to chill mixture briefly, about 15 minutes.

Step 4

Pour mixture into an ice cream maker and churn according to manufacturer's instructions, about 20 minutes. Transfer to a lidded container before serving.