Heat the oil in a wide pan or skillet over low to medium heat for about 2 minutes. Add the sliced onion and slit chilies. Saute until the onion turns light golden brown, about 5 minutes. Do not let it get too dark, or the flavor can become bitter.
Add the tomato paste and turmeric powder. Stir well and cook for about 3 minutes until the mixture looks thick and smells rich. If you notice hot oil drops coming out from sthe killet, kindly minimize the flame to low. It happened due to cold tomato paste added to hot water.
Now add the okra and potatoes together. Mix gently so the vegetables are evenly coated with the spices and tomato base. Cover the skillet and cook on low heat for 10 minutes. Check occasionally and stir lightly, but not too often, because the vegetables will cook slowly in their own steam.
After 10 minutes, the texture will start turning slightly dry and the vegetables should be about 80 percent cooked. Add salt and pepper, then stir gently so the okra stays firm and does not turn mushy. Cook for another 5 minutes, or until the potatoes are tender.
Your okra and potato stir fry is ready to serve. Garnish with fresh cilantro before serving, or use fresh basil if you want a milder herbal finish.