Vegetarian White Chili

Heat oil in a large heavy pot over medium-high heat. Add onion, poblanos and garlic; cook, stirring often, until softened, about 6 minutes. Add chili powder and cumin; cook, stirring constantly, until fragrant, about 30 seconds. Stir in beans, broth, green chiles and salt. Bring to a boil over medium-high heat; reduce heat to medium-low and simmer, stirring occasionally, until the vegetables are very soft, about 20 minutes. Remove from heat and stir in lime juice. Serve with desired toppings.