Heat a large fry pan with a medium heat and add in the olive oil

In the meantime, lay the cod fillets over some paper towels and pat completely dry, then season with salt & pepper on both sides

Add 1/2 cup (60 grams) flour into a shallow bowl, along with the baking powder, and whisk together, then coat each cod fillet in the flour mixture

Add the cod fillets into the pan with the hot oil, all in a single layer, and fry for 3 to 4 minutes per side or until golden fried and cooked through, then remove from the pan and set aside

Using the same pan with the same heat, add in the chopped onion and chopped garlic, mix continuously, after 3 minutes and the onions are slightly translucent, add in 1 tbsp (8 grams) of flour and continue to mix together, after 2 minutes, add in the paprika, oregano, and crushed red pepper, quickly mix together, then add in the milk and vegetable broth, and gently mix together until you get a slightly creamy sauce

After about 5 minutes and you've ended up with a slightly creamy sauce, season with salt & pepper, mix together, then add the cod fillets back into the pan, all in a single layer, then spoon some of the sauce over each fillet, and simmer for 1 to 2 minutes

Transfer the fish fillets into serving dishes, and top off with the sauce, then squeeze some lemon juice over the fish and garnish with chopped parsley ,enjoy!