One Pot Coconut Chickpea Curry

garam masala

cumin seeds

ground ginger

green cardamom pods

unsalted butter or ghee

small yellow onion, diced

large garlic cloves, minced

grated ginger, from a 3-inch peeled piece

diced tomatoes

chickpeas, drained

coconut milk, well-shaken

small head of cauliflower, chopped

baby spinach (about 5 cups, loosely packed)

Juice of 1 lemon (about 3 tablespoons)

salt, or to taste

cooked white or brown rice (or quinoa) for serving