In the same food processor or high-powered blender (no need to wash between), combine all of the filling ingredients except for the freeze dried blueberries and blend for about 2 minutes, or until the mixture is silky smooth and creamy. Scrape down the sides as necessary. You may need to add a bit more coconut milk or lemon juice to get it to blend smoothly if your blender isn’t super high-powered.
Once it’s smooth, taste the mixture and adjust the sweetness/tartness levels by adding more maple syrup, vanilla, or lemon juice, if desired.
Pour 2/3 of the filling into the prepared pan over the pecan crust. Smooth out the top and tap the pan hard against the counter a few times to release any air bubbles. Place in the freezer. If you want super clean layers, let it freeze for about an hour or until firm before adding the blue layer on top.
Add the freeze-dried blueberries to the remaining batter and blend to incorporate. Spread over the plain layer. Return to the freezer.