Melt butter in large dutch oven. Saute onion and celery until tender. Add garlic and cook briefly (don't let it brown). Then add broth, turkey, salt (if needed), pepper, sage, garlic and onion powder. If using xanthan gum, sprinkle over the top and whisk thoroughly. Add the mixed vegetables. Simmer for about 20 minutes. Add cream and simmer another 10 minutes or so.
One cup of this is remarkably filling, so you might even have leftovers, which are FABULOUS the next day.
Nutrition per 1 cup serving: Calories 201, Fat 14g, Total Carbs 3g, Fiber 1g, Net Carbs 2g, Protein 13g