Heat the cooking oil in a large skillet or pot over medium heat and add the cumin seeds until they begin to sizzle and become fragrant.
Add the finely chopped onion and saute until golden brown, then stir in the ginger garlic paste and cook for one more minute.
Add the ground beef to the skillet, breaking it apart with a wooden spoon, and cook until it is fully browned and cooked through.
Stir in the turmeric powder, salt, and half of the garam masala, ensuring the meat is thoroughly coated in the spices.
Fold in the cubed potatoes and cauliflower florets, tossing well to mix the vegetables with the beef and spices.
Cover the skillet and simmer on low heat for 20 minutes, stirring occasionally, until the potatoes and cauliflower are fork-tender.
Remove from heat, sprinkle with the remaining garam masala and freshly chopped cilantro, then serve hot.