Nana's Beef Stroganoff
Shake 1 tablespoon flour with salt in a large, resealable plastic bag until combined; add beef and shake to coat.Advertisement
Melt 2 tablespoons butter in a skillet over medium-high heat. Brown beef in the hot butter, about 3 minutes per side. Stir mushrooms, onion, and garlic into beef; cook and stir until garlic is fragrant, 3 to 4 minutes. Transfer beef and vegetables to a bowl, leaving drippings in skillet.
Melt 2 more tablespoons butter in skillet over medium heat. Cook and stir 3 tablespoons flour in the hot butter until smooth; stir tomato paste into flour mixture. Whisk beef stock into mixture and cook, stirring constantly, until sauce is thickened and bubbling, about 5 minutes.
Return beef and vegetables to skillet and stir to coat with sauce. Reduce heat to very low and simmer until beef is tender, 2 to 3 hours. The longer it cooks, the more tender the meat will be. Just before serving, stir sour cream and white wine into beef mixture and heat through. Do not boil.
Try using a Reynolds® slow cooker liner in your slow cooker for easier cleanup.