In the same pan, soften the onion and garlic with the turmeric for about 2 minutes. Add the remaining ingredients and the reserved roast. Bring to a boil. Cover and bake for about 3 hours or until the meat is fork-tender. Turn the meat three times during cooking. Remove the cinnamon sticks, ginger, and hot peppers. Degrease the cooking juices, if desired. Serve with jasmine rice and sautéed broccoli.