Start the instant pot in Saute mode and heat oil in it. Add mustard seeds, cumin seeds, ginger, and saute for 30 seconds until the mustard seeds start to splutter.
Add chopped tomato and spices (turmeric, corainder, red chili powder and salt). Mix well.
Add chopped cabbage and green peas. Stir well so the spices mix with the cabbage. Make sure nothing is stuck to the bottom of the pot. If there is, add 2-3 tbsp of water, and deglaze the pot.
Close the instant pot lid with vent in sealing position. Change the instant pot setting to manual or pressure cook mode at low pressure for 2 minutes. When the instant pot beeps, quick release the pressure manually. Stir the cabbage. Garnish with chopped cilantro leaves. Enjoy Cabbage & Peas Stir Fry with roti and yogurt.