Corned Beef And Root Vegetable Hash

Name: Corned Beef And Root Vegetable Hash
Ingredients: 3 1/2 cups homemade or low-sodium store-bought chicken stock; 8 ounces Yukon gold potatoes, peeled and cut into 1/2-inch dice; 8 ounces carrots, peeled and cut into 1/2-inch dice; 8 ounces parsnips, peeled and cut into 1/2-inch dice; 8 ounces turnips, peeled and cut into 1/2-inch dice; 3 tablespoons olive oil; 1 small onion, halved lengthwise, then cut crosswise into 1/4-inch-thick slices; 8 ounces corned beef, cut into 1/2-inch dice; 2 tablespoons grainy mustard; 4 to 6 eggs, fried (or cooked any style); Freshly ground pepper