Prepare the Portuguese Sauce first;- Fry the sliced onions in the olive oil in a suitable pot without colour until the onions start to go soft then add the chopped garlic and continue to fry to sweat the garlic,
Add the tomato puree and the chopped canned tomatoes with the juice from the can.
Bring to a simmer, add the sugar and herbs, season with salt black pepper and a little sugar to taste and allow to simmer until all the flavour's are infused into the sauce. You can leave it on the side of the stove over a low heat, or put a lid on the pot and place it in the oven set at 150°C. for 30 minutes.
Now we can prepare the fish while the sauce is cooking. Here we can see the fillets of boneless skinless Cod on the tray on the left, a bowl of seasoned flour to the rear and a bowl with a mixture of melted butter and vegetable oil, then to the right a lightly oiled clean shallow gastronome tray.
Dip each fillet of fish first into the seasoned flour and coat fully, then dip into the oil and butter mixture and place each fillet of fish onto the lightly oiled tray, folding the fish in half.
Once all the fillets of fish are on your trays place the pot of hot Portuguese sauce on the bench next to the fish.
We are going to now use just half of our sauce. Using a small ladle put some sauce over each fillet of fish without covering the whole fillet, we want some of the white fish to still be visible, we don't flood the fish with sauce, we will be adding more sauce later, this sauce is just to impart some colour and flavour to the fish.
Return the remaining sauce to the stove and keep warm.
This fish will only take about 15 minutes to cook, so about 20 minutes before your service time starts,Place the fish in the oven at 180C for 15 Minutes, When the cooking time is complete just check the core temperature has reached 75C. if not return to the oven.
as the fish is about to come out of the oven ensure the remaining sauce is hot..
When the fish comes out of the oven the sauce may look a little dry on the top, but you will also see the way the Portuguese sauce infuses into the fish.
When the fish has reached temperature and is cooked remove from the oven and transfer to a clean tray and add a little more fresh Portuguese sauce. then
Garnish with Lemon and Chopped Parsley and place on the counter for service.