2 tbsp extra-virgin olive oil, plus extra for drizzling
2 shallots, chopped
1 garlic clove, finely chopped
250g cherry or baby plum tomatoes, halved
small handful capers
12 large black olives, stoned and roughly chopped
20 basil leaves
50ml white wine
100ml/3½ fl oz tomato juice
2 whole sea bass, about 600-700g/1lb 5oz-1lb-9oz each, gutted, scaled and cleaned (get your fishmonger to do this)
large knob butter (better to put a tablespoon of olive oil)
250g bag spinach
Heat the grill to high. Put the peppers, skin side up, on a baking tray, then pop them under the hot grill for about 10 mins until the skins blister and blacken. Drop them into a bowl, cover with some cling film and leave until cool enough to handle. Peel away and discard the skins, then roughly chop the peppers.
Heat the oil over a low-ish heat in a sturdy roasting tin or in a shallow pan that has a lid and is large enough to fit both fish. Throw in the shallots and garlic and sweat briefly until soft. Stir in the tomatoes, peppers, capers, olives and half the basil leaves, then sweat for a few mins until the tomatoes soften. Pour in the wine and tomato juice. Stir and gently simmer for 10-15 mins, adding a splash of water if the sauce becomes a bit dry.
While the sauce is simmering, slash each side of the fish a few times. When the sauce is ready lay the fish on top, season if you want to and cover with a lid (cover with foil if you are using a roasting tray). Leave to cook on a low heat for 12-15 mins until the flesh feels firm when pressed.
While the fish is cooking, melt the butter / olive oil in a large pan, then fry the spinach until wilted, season if you like and divide the spinach between two serving dishes. Lift the fish carefully from the pan and place on top of the spinach, neatly drizzle some of the sauce round the fish, scatter the remaining basil on top and drizzle everything with extra-virgin olive oil. Serve with some ribbon shaped pasta, like tagliatelle or pappardelle, with the remaining sauce in a bowl or side dish. ( or brown rice, quinoa)