The roasted potatoes I done these without any precooking, basically just get some medium to small potatoes (enough for the people you cooking them for, around 2-3 per person), peal them and the larger ones cut in half. Place a roasting tray in the oven with some olive oil to cover the bottom, then once hot place the potatoes in and back into the oven for about 45 minutes at 200c (temperature) and that should be the potatoes done.
The cauliflower and broccoli (yes I did broccoli, but is not on the picture as plate was already full) I steamed these, by putting a pan on the stove with about 1 inch deep of water with a little salt, I washed and cut both of these veg to more manageable pieces and place them in the pan with a lid on and once started boiling I reduced the flame to just above minimum to continue the boiling and placed a lid on the pan to recycle the water and steam, I cooked these for 15 minutes, obviously keep a check as you may want them better cooked or less cooked. but that is the veg done.
The fish, this one you dry very well with either paper towels or kitchen towel, squeezing the fish to really draw the excess water (as they always have lots of water) this is important as next we marinade the fish and we want these marinade to be absorbed. On a little container (maybe a ramekin) mix the lemon juice and the garlic, leave it for about 3-5 minutes to infuse flavours and then put it all over the fish marinading the fish in this leaving it for 30 minutes, don't forget to also add a little salt and pepper to the marinade. Once this is done, you place a frying pan on the stove with about 1/2 inch of vegetable oil, and piece by piece (of cod) you pass it through the flour, both sides shake off the excess than into the egg making sure is well involved, than into the piping hot oil, repeat the process until the frying pan is full, but make sure at the same time you need to turn the fish over as soon as it is sealed, letting it cook on both sides until is golden brown, I had to do the fish into two go's as it didn't all fit in the first batch in the frying pan. Once the fish is cooked place it on a plate with a couple of paper towels to absorb the excess oil. And you done, it is delicious and the fish just flakes off when you eat it.
I use the above accompaniment in the winter and in the summer (also a more traditional Portuguese way) I do it with tomato rice and a mix salad of tomato, onion and lettuce (with a little vinaigrette, making this meal lighter and more refreshing. Have fun..