Preheat the oven to 350 degrees F.

Add chips to a food process and chop until they are a fine crumb. Pour chip crumbs on to a large plate.

In a medium mixing bowl, whisk together egg and buttermilk.

Dip each half of fish filet into the egg mixture, then coat in the ground sweet potato chips, and then place each coated fish piece on to a large baking sheet lined with a wire rack. Continue with each strip, until all are coated.

Bake fish sticks in the oven for 20 minutes. Serve right away with lemon and tartar sauce.