Step 1

Heat oven to 200C/fan 180C/gas Put the tomatoes onto a baking tray, rub with a little oil and some seasoning, then roast for 5 mins until the skins are starting to split. Add the fish to the tray, top with most of the lemon zest and some more seasoning, then drizzle with a little more oil. Roast for 8-10 mins until the fish flakes easily.

Step 2

Meanwhile, cook the beans in a pan of boiling water for 3 mins until just tender. Drain, then tip into a food processor with the rest of the oil, garlic, basil stalks, lemon juice and stock, then pulse to a thick, slightly rough purée. Season to taste.

Step 3

Divide the tomatoes and mash between two plates, top with the cod, then scatter with basil leaves and the remaining lemon zest to serve.