Before starting this Rack of Lamb with Mustard & Parsley recipe, make sure you have organised all the necessary ingredients. Trim the lamb racks, then place on a baking sheet. Sprinkle with salt, pepper and oil. Preheat the oven to 200°C (gas 6)... ... and bake for about 10 minutes. Dilute the mustard with a little water. Remove the lamb from the oven. Using a brush, spread the mustard... ...