Thanksgiving Turkey Meatballs

Name: Thanksgiving Turkey Meatballs
Ingredients: 4 tablespoons unsalted butter; 3 stalks celery, finely diced; 2 whole carrots, finely diced; 1/2 cup finely diced shallots (roughly 3-4 shallots); 2 tablespoons finely chopped fresh sage; 2 tablespoons finely chopped fresh thyme; 2 tablespoons finely chopped fresh oregano; 2 1/2 pounds ground dark meat turkey; 1 pound ground pork; 1 cup panko bread crumbs; 2 lemons, zested and 1 tablespoon of juice reserved for the gravy; 2 tablespoons kosher salt; 1 tablespoon freshly cracked black pepper; 1 cup heavy cream; 2 eggs; vegetable oil for frying; 1-2 quarts turkey or chicken stock; 1/2 cup unsalted butter; 1/2 cup all-purpose flour; Kosher salt and freshly cracked black pepper