Principle spices use in central region of India is Cumin Seeds, Nigel Seeds, Ajwain Seeds, and Coriander Seeds, Cumin seeds, Cloves and cinnamon sticks.
Bhuna style means roasted or toasted. Central region of India is famous from the jungle called sunder van, many wander in this forest for picking dry wood to sell it for money making. They pass many days in the jungle, during this period they hunt for quick meals and without the use of utensils. Cooking is hard so they roast / cook food on fire with help of skewers. This became fashionable in the modern days.