Cut chicken into 3cm cubes and marinate with yogurt (reserve half), garlic powder, onion powder, and garam masala; season to taste
Brown pumpkin in casserole with 50ml olive oil for 5 minutes
Add chopped garlic and onion; sauté 5 minutes, then add turmeric, water to cover pumpkin, and cook 45 minutes
Blend mixture and adjust salt as needed
Sauté chicken in frying pan with olive oil over low heat for 5 minutes
Plate and serve