In the same pan that you browned the turkey, add 2 tablespoons of olive oil to the pan over medium heat. Sauté the mushrooms until they are browned and crispy. Add shallots and garlic and allow them to gently sweat until they are very limp and fragrant (about 5 minutes). Add the flour and whisk to coat the shallots.
Add the white wine and chicken stock. Add the bouquet garni and simmer over medium low heat until the mixture is thick and creamy.
*Bouquet garni is French for “garnished bouquet”. It is a bundle of fresh herbs that are tied together with kitchen twine and used to flavor soups, stews and sauces