Steps

• Gather all your ingredients. Dice the chicken breast into bite-sized pieces, slice the mushrooms, chop the onion, and mince the garlic.
• Heat olive oil in your skillet over medium-high heat. Add the diced chicken pieces, season with salt and pepper, and cook until browned on all sides.
• Remove chicken from the pan. In the same skillet, sauté onions until translucent, then add garlic and mushrooms until mushrooms are golden brown.
• Lower the heat and sprinkle flour over the mushroom mixture, stirring continuously. Gradually add chicken broth until the sauce thickens, then mix in sour cream.
• Return chicken to the pan, coating it with the sauce. Simmer gently for about 10 minutes. Adjust seasoning if needed.