Prepare dressing mix according to package directions. Saute mushrooms in butter until well browned. In a bowl, mix together soup, sour cream, lemon juice, paprika, salt and pepper. Add mushrooms and chicken.
Put chicken mixture in a 2 quart casserole dish. Top with dressing. Bake at 350 degrees for 30 minutes.
Recipe by the south in my mouth at http://www.thesouthinmymouth.com/2016/02/23/the-meat-and-potatoes-guy/