Heat 2 tbsp oil in a pot, fry halved potatoes until golden, then remove and set aside.
In the same pot, add remaining oil, sauté onions until soft.
Stir in garlic and ginger; cook until fragrant.
Add tomatoes, salt, cumin, chili powder, black pepper, turmeric, and cook until oil separates.
Mix in yogurt, mint, cardamom, cinnamon, and chicken chunks; cook until chicken is tender.
Add fried potatoes back to the pot and gently mix.
Cover and simmer on low until everything is well blended and aromatic.
Serve hot with raita, Cabbage Cucumber Salad, or Lemonade.