Add the onion, garlic powder, ginger, turmeric, curry powder, salt, sweet potato, chickpeas, cauliflower, tomato paste, 1/4 cup coconut milk, and broth to a 6-quart slow cooker.
Stir to combine, then cover and cook on high for 3-4 hours, or low for 5-6. Check for doneness on the early side to avoid overcooked vegetables.
Uncover, add the spinach, peas, ¼ cup coconut milk, 1 teaspoon salt, and lime juice, stirring to wilt the spinach. Taste and add additional salt or lime juice if desired.
Serve as is, or with rice, cilantro, flaked coconut, and additional fresh lime juice.
Stovetop Instructions
Heat 1 tablespoons olive oil in a large Dutch oven over medium heat. Add the onion and saute until translucent, about 5 minutes. Add the ginger, garlic powder, turmeric, curry powder, and tomato paste, cooking until fragrant.
Add the sweet potato, chickpeas, cauliflower, broth, ½ cup coconut milk and salt. Cover, bring to a boil, then reduce to a simmer. Simmer, covered, for 30-40 minutes, or until the vegetables are very tender.
Uncover, add the spinach, peas, lime juice, and salt, stirring to wilt the spinach. Taste and add additional salt or lime juice if desired.
Notes
Heat levels of slow cookers can vary, so to avoid overcooked vegetables check the contents at the early end of the suggested cook time. For a mild curry, use mild curry powder. For a spicier curry, use spicy curry powder. See above post for ingredient substitutions. Note: I have not yet tested this recipe in an Instant Pot.