Place the chicken into a bowl. Season he chicken with salt, pepper, thyme, paprika and garlic powder. Set aside.
Heat 1 tablespoon of oil in a large skillet over medium - high heat. Working in two batches, add the chicken and cook for about 5 minutes or until they start to turn golden brown, stirring as needed. Add the remaining oil as needed through the cooking process. Remove the chicken from the skillet.
In the same skillet, melt 2 tablespoons of butter. Add the onion and cook until slightly soft, about 2 minutes. Add the garlic and cook for about a minute. Add the mushrooms and saute, stirring until they begin to brown, about 4 minutes.
Add the remaining 1 tablespoon of butter to the skillet, when melted stir in the flour. Stir until all the ingredients seem incorporated. Cook the mixture for about 1 - 2 minutes.
Pour the wine and with a spoon (I use a wooden spoon) scrap down the brown bits collected at the bottom of the skillet. Reduce the wine for about 2 minutes.
Add half of the broth slowly while stirring. When incorporated, add the remaining broth. Stir in the mustard and Worcestershire sauce, Return the chicken to the pan and bring to a gentle simmer. Cook for about 5 - 6 minutes, or until the chicken is cooked through. The sauce will thickened as you simmer.
Add the sour cream and stir well to combine. Simmer for an additional 2 minutes, making sure the sauce doesn't boil. Add salt and pepper to taste and remove from the heat. Serve over hot egg noodles and garnish with chopped parsley.