When we moved into our new home last year, I had grand plans to transform the sprawl of brambles and ivy into a productive cottage garden. Although the weeds have proved more powerful than either my ambitions or my secateurs, I have managed to grow a precious handful of tomatoes for this punchy summer salad. I am hoping to produce more ingredients each year, although I’m not sure a Walthamstow pond will ever manage fresh mackerel! Grilled mackerel with summer butter bean salad Prep 5 min Cook 15 min Serves 2 Vegetable oil 2 corn cobs 1 large mackerel, filleted 1 x 700g jar butter beans, drained 1-2 mild red chillies, seeds, stems and pith removed, and finely chopped Ancho chilli flakes 250g tomatoes (I used a mixture of heritage varieties), diced For the green dressing 50g brown onion, peeled and sliced 50g fresh coriander, tougher parts of stem removed, roughly chopped 30g dill, tougher parts of stem removed, roughly chopped 25g apple 3 tbsp olive oil 1 lime, juice and zest 1 pinch of fine salt To make the green dressing, put all the ingredients into a blender and blitz until finely minced, adding a little water to loosen if the mix is too dry. Set aside until you’re ready to serve. For the corn, heat an oiled griddle or cast iron pan over a medium heat. Put the corn cobs in the pan and cook for eight minutes, turning regularly with tongs until lightly charred all over. Set aside to cool. Salt the mackerel fillets, add a little more oil to the pan and put the fish in the pan skin side up. Cook for three minutes on each side, until the skin is crispy and the flesh firm. While the fish cooks, mix the beans with the chillies in a large bowl. Use a sharp knife to slice the kernels from the corn and stir these into the beans along with the tomatoes and a generous sprinkling of ancho chilli flakes. To serve, portion the salad on to two plates, drizzle the green dressing over and then top with a slice of grilled mackerel. Discover this recipe and many more from your favourite cooks in the new Guardian Feast app, with smart features to make everyday cooking easier and more fun