Heat the instant pot in saute mode and add oil to it. Add cumin seeds, garlic and saute for 30 seconds.
Add the sliced onion and saute for 3 minutes.
Add chopped tomato, spices and okra. Mix well. (If your instant pot is prone to burn or if using an 8qt instant pot, add 2-3 tablespoons of water)
Hit cancel and close the instant pot lid with vent in sealing position. Start the instant pot in Manual or Pressure cook mode for 2 minutes at low pressure.
When the instant pot beeps, hit cancel and do a quick pressure release.
Stir the okra gently. Leave open for 5 mins before eating.
It is possible the instant pot may not come to pressure, but the okra is still cooking and will be ready in 2 minutes.
If you don't have amchur, you can use 1 tablespoon of lemon juice.
On the Instant Pot DUO-60, you press the manual mode, then pressure to change the pressure setting.
To make this bhindi masala on stove top in a pan, follow the same steps. In place of pressure cooking, cover with a lid and cook for 5 minutes. Then open and cook on medium-low flame for 10 more minutes.