This all-in-one slow cooker roast beef joint means you don ... Mash a small amount of the gravy into the remaining cornflour to make a smooth paste. Whisk back into the rest of the gravy.
Meanwhile, make the gravy by straining the juice from the slow cooker into a saucepan. Place on a low-medium heat. In a cup, mix the cornflour with the milk, then whisk this mixture into the warm ...