Chickpea and Sweet Potato Curry

Name: Chickpea and Sweet Potato Curry
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: Asian, Indian
Ingredients: 1 tablespoon olive oil or vegetable broth; 1 medium onion, small dice; 3 garlic cloves, minced; 1 tablespoon minced ginger; 1 serrano pepper or jalapeño, seeded and minced (optional); 1 medium red bell pepper, thinly sliced; 1 medium sweet potato, peeled, cut into ½-inch cubes; 1 ½ teaspoons ground cumin; 1 teaspoon paprika; ½ teaspoon turmeric; ½ teaspoon cinnamon; ¼ teaspoon cayenne pepper (optional); 2 (15-ounce) cans chickpeas, drained and rinsed; 1 (14-ounce) can diced tomatoes; ¾ cup vegetable broth or water, plus more as needed; 1/3 cup peanut or almond butter (use SunButter for nut-free); Fresh lime juice to taste; Salt to taste; 1/3 cup chopped cilantro, for garnish (optional)