Bring stock, potatoes, carrots, parsnips, and turnips to a boil in a large saucepan. Reduce heat, and simmer until just tender, about 6 minutes. Drain, reserving 1/2 cup liquid; set aside.
Meanwhile, heat oil in a large non-stick skillet over medium heat. Add onion; cook, stirring occasionally, until softened, about 6 minutes. Add vegetables and the reserved 1/2 cup cooking liquid. Cook, stirring occasionally, until vegetables are browned, about 25 minutes. Stir in corned beef and mustard. To serve, top with eggs, and season with pepper.
Corned Beef and Root Vegetable Hash
Russell's Saturday Brunch
Nutritious and Delicious!