1. Peel and chop potatoes into chunks. Boil in salted water 15–18 mins until tender. Drain and mash with butter and a splash of milk. Season.
2. Slice the chicken into strips. Season with salt, pepper and smoked paprika.
3. Fry chicken in butter over high heat 4–5 mins until golden. Remove and set aside.
4. In the same pan, fry sliced mushrooms 4–5 mins until golden. Add diced onion and minced garlic, cook 3 mins.
5. Add tomato puree and stir 30 secs. Pour in the chicken stock and simmer 3–4 mins. Lower heat and stir in sour cream until smooth. Return chicken to the pan and heat through.
6. Serve stroganoff over mash, garnished with fresh parsley.