James Martin served up tasty grilled mackerels with pepper dulse butter and a vegetable stew side dish on James Martin: Home Comforts.

James says: “This quick fish dish with summer vegetables is packed with flavour thanks to a quick and easy seaweed butter.”

The ingredients are: 20g dulse seaweed, 175g butter, softened, ½ lemon, juice only, 2 fresh mackerel, guts removed, 1 shallot, thinly sliced, 75g broad beans (without pods, inner membranes removed), 100g fresh peas, half removed from their pods, half split but left in the pods, 12 asparagus spears, trimmed and 4 sprigs fresh tarragon, leaves only.