Sauté the aromatics: In a large pot or skillet, heat the oil over medium heat. Add the onion and cook until softened, about 5 minutes. Stir in the garlic and ginger, cooking for another minute until fragrant.
Add spices: Stir in the curry powder, cumin, and turmeric, and cook for another minute to toast the spices.
Add tomatoes and coconut milk: Pour in the diced tomatoes and coconut milk, stirring to combine.
Add cauliflower and chickpeas: Bring the mixture to a simmer, then add the cauliflower florets and chickpeas. Cover and cook for 15-20 minutes, or until the cauliflower is tender.
Season and garnish: Stir in lemon juice and season with salt and pepper to taste.
Serve: Ladle the curry over rice or with naan bread. Garnish with fresh cilantro.
Tips:
For extra heat, add a dash of cayenne pepper or a sliced green chili.
Try adding spinach or peas at the end for additional color and nutrients.