Use the Sauté function to heat the Instant Pot. When display reads "Hot", add the oil. When the oil shimmers, add the cumin seeds. They'll splutter like popcorn. Once this spluttering occurs, add in the potatoes and sauté. You want the potatoes to brown and crisp a little, and you want good, brown fond (crispy bits) at the bottom to flavor the final dish. Add the spices and sauté briefly. Add in the tomatoes and the water and scrape up all the lovely fond at the bottom. Add in the cauliflower and set your Instant Pot to cook at low pressure for 2 minutes. When time is up, quick release the pressure and garnish with chopped cilantro if needed. Serve and enjoy!