Variations to mix into the cooked, mashed potatoes: Freshly chopped herbs such as parsley, dill, sage and rosemary; roasted garlic; nonfat chicken broth instead of milk; favorite cheeses ...

Whether you're serving up bangers or a shepherd's pie, the quality of your mashed potatoes can make or break the dish. Now, a top chef has revealed her secrets to achieving perfect mash every time ...