Prep Your Veggies: Cut the cauliflower and potato into bite sized pieces and set aside. I like to cut them into a similar size, then they cook at the same pace.
Saute Your Spices: Heat oil on medium high heat in a large pan, add the mustard seeds and cumin seeds until they pop. This is an important step to bringing out the aromatics in the spices.
Let The Sabji Cook Through: Add the salt and cumin powder, cover and let cook on low heat for 10-20 minutes (depending on how cooked through you like your veggies).