Turn Instant Pot to Saute mode.
Once the hot sign displays add oil and cumin seeds. Sauté for 30 secs.
Add onions and mix well. Cook covered with a glass lid on for 3-4 min.
Add ginger and garlic, stir and cook for additional minute.
Add tomatoes, mix and cook covered for 2 minutes.
Add turmeric, red chili powder, cumin-coriander powder, garam masala and salt. Mix well.
Add potatoes and cauliflower florets. Add ¼ cup of water. Mix well.
Put Instant Pot lid on with pressure valve to sealing. Cook on Manual(Hi) for 3 mins. Note: Cook for only 2 mins if you like cauliflower to be more firm.
Quick Release and stir gently. Garnish with cilantro.
Serve hot with naan. I like mine with rice.