2) Mix in 200g of grated cheddar and the dill, and allow the mixture to sit at room temperature for 20 minutes.
3) Meanwhile, preheat the oven to 180°C/gas mark 4. Grease a 22x33 by baking tin.
4) Pour the batter into the prepared pan, smooth the top, and sprinkle with the remaining grated cheddar. Bake for 30 to 35 minutes, or until a toothpick comes out clean. Cool and cut into large squares. Serve warm or at room temperature.