In a pan, add oil and heat on medium.Add green chili and cook for 2 minutes.Add onion, mix and cook on low-medium heat until onion starts to turn translucent. 6-8 minutes.Add the Okra and turmeric, mix and cook, uncovered, on low-medium heat, for 25-30 minutes.Stir twice in between.Once Okra is cooked to preference, add salt and mix well. Take off heat.Add chili powder if you like and mix well.Serve hot.