Preheat your oven to 175ºC / 350ºF and line a baking tray with baking paper or if you have a grill tray, line the bottom with the paper.
Slice your cod fillets into “fingers”, about 2cm thickness.
Create an assembly line by placing the almond flour in one bowl, the tapioca with the salt, pepper and garlic in another, and the whipped egg in the last.
Dip the fingers onto the tapioca, then into the egg, shake off the excess and onto the almond flour. Place on the baking tray and repeat with remaining fish fingers.
Bake in the oven for 10-55 minutes, until fish is cooked through and the outside is crispy. Let cool for 5 minutes before serving.
While the fish bakes, make the tartar sauce by blending all the ingredients in a small blender or food processor. Set aside.
To serve, toast your bread and butter it, if desired. Add the rocket leaves, topped with the fish fingers, and drizzle on the tartar sauce.
Recipe by Sprinkle of Green at https://www.sprinkleofgreen.com/homemade-healthy-fish-finger-sandwich