James Martin served up tasty tuna carpaccio with caramelised watermelon from a dinner party on James Martin: Home Comforts.

James says: “This refreshing combination of prepared watermelon, raw tuna and zingy lemon dressing makes a head-turning dinner party starter. You need to prepare the melon well in advance for the full effect.”

The ingredients are: ¼ watermelon, peeled, flesh cut into 1cm-thick slices, 2 thin slices sourdough bread, 4 x 50-75g fresh tuna loin steaks (ask the fishmonger for sushi-grade tuna)
1 lemon, juice only, 2 tbsp very finely chopped fresh chives, plus extra to serve, 1 shallot, very finely chopped, plus extra to serve, knob of butter, sea salt and freshly ground black pepper and 2 tbsp extra virgin olive oil, to serve.