Place the sweetpotatoes and red bell peppers in a large bowl with 1 tablespoon olive oil and toss to coat. Sprinkle liberally with kosher salt and black pepper. Transfer to a large, rimmed baking sheet lined with parchment paper or aluminum foil, and roast until tender, about 20 minutes. Toss halfway through.
Meanwhile, heat the remaining 2 teaspoons of oil in a Dutch oven or saucepan over low heat. Add the green onion and cook, stirring frequently, until golden, about 3 minutes.
Raise the heat, add the tomatoes, water, beans, corn, cumin, chili powder, and garlic powder and bring to a simmer. Stir in the cooked sweetpotatoes and bell peppers and continue to simmer, stirring occasionally, until heated through, about 5 minutes.
Stir in the lime zest. Add the honey and cilantro to taste and as desired.
Serve with optional toppings.
Notes
There is more to this chili than meets the eye. It also contains 100% vitamin C per serving, 38% iron, and 220% of your daily requirement for vitamin A.