INGREDIENTS
•
2 cups lamb stock or chicken stock, homemade or low-sodium canned, including any remaining leftover lamb roast juices
•
5 tablespoons unsalted butter
•
1 medium onion, finely chopped
•
1 tablespoon red-wine vinegar
•
1 teaspoon tomato paste
•
3 cups leftover cooked leg of lamb, trimmed of all fat and gristle and cut into 1-inch cubes
•
1 tablespoon Worcestershire sauce
•
1/8 teaspoon cayenne pepper, to taste
•
Salt and freshly ground pepper, to taste
•
1/4 cup finely chopped fresh parsley or dill
•
2 tablespoons grated Parmesan cheese
•
3 cups mashed potatoes (see Note)