Grease and flour a baking pan (you can use coconut flour).
Preheat oven to 350ºF.
Combine almond meal, flaxseed, coconut flakes, carob powder, coconut oil, date syrup, baking soda, apple cider vinegar and sea salt into a food processor and process until well combined.
Add eggs, one at a time, pulsing after each addition - until well blended.
Pour into prepared pan. Mix in pistachios.
Bake for 25 minutes.
Cover with foil and bake another 10 minutes until firm, but moist.