Begin by patting the cod dry with paper towels to ensure it's moisture-free, which helps the seasoning adhere perfectly. After drying, place the cod in a baking dish or on a clean surface, ready for seasoning.

In a medium bowl, combine the gluten-free flour with ground coriander, paprika, ground cumin, salt, black pepper, and red pepper flakes. Mix well until all the spices are evenly distributed throughout the flour.

In a separate bowl, whisk together the fresh lemon juice, olive oil, and melted butter until well combined. Stir in the minced garlic.

Dip each piece of the dried cod into the lemon-garlic mixture, allowing any excess sauce to drip off. Once coated, dredge it in the flour-spice mix, pressing gently to ensure even coverage.

Heat a tablespoon of olive oil in an oven-safe skillet over medium-high heat. Once hot, carefully place the coated cod in the skillet. Sear each piece for about 2 minutes on each side until golden brown.

Preheat your oven to 400°F (200°C). Pour the remaining lemon-garlic sauce over the cod in the skillet and transfer the skillet to the preheated oven and bake for 8-10 minutes.

Remove the skillet from the oven, let the cod rest for a minute, then sprinkle freshly chopped parsley over it before serving.