Total Time: 25 minPrep: 10 minCook: 15 minYield: 12Level: easy
Heat oil in a small skillet over medium-high heat; add mustard seeds and cover skillet. Cook until seeds stop popping, 2 to 3 minutes. Add onion to the skillet; cook and stir over low heat until translucent, about 10 minutes.
Mix garlic, ginger, turmeric, chile powder, and salt into onion mixture; cook and stir for 30 seconds. Add cauliflower; cook and stir for 1 minute. Transfer cauliflower to a microwave-safe bowl and cover bowl.
Cook cauliflower in microwave until tender, about 3 minutes. Drizzle lemon juice over cauliflower.