In a large pot, heat olive oil and butter over medium heat until melted.
1 tablespoon olive oil, 1 tablespoon butter
Add the chopped onion, carrots, celery, and minced garlic. Cook for about 10 minutes, stirring occasionally, until the vegetables are soft.
1 onion, 1 carrot, 2 stalks celery, 1 garlic clove
Add the thyme sprigs, stock, cooked turkey, and bay leaves to the pot. Stir everything together and let it cook for another 10 minutes. Season the soup with salt and pepper to taste.
4 sprigs thyme, 6 cups turkey or chicken stock, 2 cups cooked turkey, 2 bay leaves, Salt and pepper
Add the couscous and cook for an additional 5 minutes or until the couscous is tender.
½ cup couscous
Remove the thyme sprigs and bay leaves from the soup. Ladle the soup into bowls and garnish with freshly chopped parsley before serving.
1 tablespoon parsley