Preheat your oven to 400 degrees F.
Mix together the lemon juice, extra virgin olive oil, and melted butter in a shallow bowl. Set aside for later use.
In another shallow bowl, combine all-purpose flour with ground coriander, sweet Spanish paprika, ground cumin, salt, and black pepper.
Pat each piece of cod dry with paper towels. Dip them first into the lemon sauce and then into the seasoned flour mixture.
Heat 2 tablespoons of olive oil in a cast iron skillet or oven-safe pan over medium-high heat. Sear each side of the coated fish fillets for about two minutes.
Remove the skillet from heat. Add minced garlic to your reserved lemon sauce and mix well. Drizzle this over your fish fillets.
Place your skillet in the heated oven and bake until the fish flakes easily with a fork, around ten minutes.