Roast Beef Hash

Name: Roast Beef Hash
Ingredients: 1⁄4 cup beef drippings or canola oil; 2 cups boiled and cooled yukon gold potatoes, cut into 1/4″ cubes; 1 medium onion, finely chopped; 2 cups cold roast beef, cut into 1/4″ cubes; 2 cloves garlic, finely chopped; 1 tsp. fresh thyme, finely chopped; 1⁄8 tsp. cayenne; 1⁄8 tsp. ground nutmeg; Kosher salt and freshly ground black pepper, to taste; 1⁄2 cup heavy cream; 2 tbsp. chopped parsley