Press the sauté button, add the oil and allow it to heat up for a minute.
Add the diced onions and stir-fry for 8-10 minutes, or until they begin to brown.
Add the garlic and ginger, stir, then add the tomatoes and cook for 4-5 minutes, or until they break down.
Add the mushrooms and spices and mix well.
Add the water, mix well, then secure the lid, close the pressure valve and cook for 5 minutes at high pressure.
Open the valve to quick release any remaining pressure.
Add the bell pepper and onion to the pot, press the sauté button, and stir-fry for 5 minutes, or until the onion and bell pepper have softened.