Blend garlic, chili flakes, vinegar, soy sauce and olive oil with 1/2 cup of parsley until smooth.
Place cod in a bowl.
Divide parsley marinade into two equal parts and pour one portion over cod and mix around until cod is completely covered in marinade.
Wrap one slice of bacon around the center of each piece of cod and place in roasting tin.
Repeat until all four cod fillets are covered with bacon.
Place in a preheated oven at 450 and allow to cook for approx. 15 mins, or until you can see the flakes begin to form in each fillet, then remove from oven.
Carefully tip out released cod and bacon juices into the set aside portion of marinade.
Add 1/4 cup of parsley and blend until smooth.
Heat the broiler on high and place fish, still in the roasting pan under it. The bacon and the edges of the cod will become golden. Only a minute or two is necessary.
Serve immediately with a generous spoonful of sauce.