Trim the broccolini into 7cm lengths. Bring a medium saucepan of salted water to the boil and boil the broccolini for 3 minutes. Drain well and transfer the broccolini to a serving plate.

Return the dry saucepan to the heat and add the butter. When the butter foams and turns a nutty brown, add the soy sauce and remove from heat. Pour the mixture over the broccolini and serve with a cheek of lemon.