I have never eaten such delicious chicken ❗Hungarian chicken recipe!

Ingredients:
Chicken - 4 pcs.
Butter.
Red onion - 1 pc.
Garlic - 3 cloves.
Tomato - 2 pcs.
Water or chicken broth – 200 ml.
Sour cream - 150 gr.
Potatoes - 800 gr.
Salt.
Black pepper.
Paprika - 3 tsp.
Flour - 2 tbsp.
Oregano.