Sweet Potato and Black Bean Chili

I found this while looking for meat-less meals. I didn't have any chipotle chili, so I used a combination of cayenne and chili powder. Turned out OK. I have wimpy taste-buds and can't handle spicy.
Found the recipe here.

Ingredients

• 2 teaspoons extra-virgin olive oil
• 1 small onion, finely diced
• 1 small sweet potato, peeled and diced
• 2 cloves garlic, minced
• 1 tablespoon chili powder
• 2 teaspoons ground cumin
• 1/4 teaspoon ground chipotle chile, (see Note)
• 1/8 teaspoon salt, or to taste
• 1 1/3 cups water
• 1 15-ounce can black beans, rinsed
• 1 cup canned diced tomatoes
• 2 teaspoons lime juice
• 2 tablespoons chopped fresh cilantro

Preparation

1. Heat oil in a large saucepan over medium-high heat. Add onion and potato and cook, stirring often, until the onion is slightly softened, about 4 minutes. Add garlic, chili powder, cumin, chipotle and salt and cook, stirring constantly, until fragrant, about 30 seconds. Add water, bring to a simmer, cover, reduce heat to maintain a gentle simmer and cook until the potato is tender, 10 to 12 minutes. Add beans, tomatoes and lime juice; increase heat to high and return to a simmer, stirring often. Reduce heat to maintain a simmer and cook until slightly reduced, about 4 minutes. Remove from the heat and stir in cilantro.