Chicken Curry a taste bud delight Cari Ga

Name: Chicken Curry, a taste bud delight (Cari Ga)
Ingredients: 30 grams olive oil; 1 stem of lemon grass, white part only and roughly chopped; 2 cloves of garlic, peeled; 1 onion, peeled and quartered; 1 cm of fresh ginger; 1-2 level tablespoons of Babas meat curry powder, depending on your heat taste; 350 grams of sweet potato, peeled and coarslely chopped; 1 carrot, coarsley chopped; 1 heaped tablespoon of chicken or vegetable stock; 1 400 can of coconut milk/cream; 3 dried bay leaves; 600-700 grams of chicken thighs/breast, cut into medium cubes; 2 level teaspoons of brown sugar; 2 level teaspoons of fish sauce; fresh corriander leaves for garnish