Heat 1 TBSP butter in a pan on medium heat. Add onions and saute until soft and transparent. Remove onions and set aside.
Next, in the same pan, heat gravy on medium high. Add tarragon, thyme, and nutmeg and heat until warm. Reduce heat to low and add sour cream. Mix well and stir continuously until sauce comes to a simmer. Do not boil! Stir in turkey and onions. Serve over egg noodles and/or mash potatoes.
Change It Up: I’m not a big fan of mushrooms, but you can cook them with the onions in this recipe, if you’d like to add them. You can also make this beef stroganoff or chicken stroganoff!