4 sweet potatoes (about 1 1/2 pounds), peeled and cut into 1" chunks
1 large onion, preferably red, chopped
1/2 cup extra virgin olive oil
Salt and freshly ground black pepper
1 to 2 tablespoons minced fresh hot chili, like jalapeño
1 clove garlic, peeled
Juice of 2 limes
2 cups cooked black beans, drained (canned is fine)
1 red or yellow bell pepper, seeded and finely diced
1 cup chopped fresh cilantro.
Heat oven to 400 degrees. Put sweet potatoes and onions on a large baking sheet, drizzle with 2 tablespoons oil, toss to coat and spread out in a single layer. Sprinkle with salt and pepper. Roast, turning occasionally, until potatoes begin to brown on corners and are just tender inside, 30 to 40 minutes. Remove from oven; keep on pan until ready to mix with dressing.
Put chilies in a blender or mini food processor along with garlic, lime juice, remaining olive oil and a sprinkle of salt and pepper. Process until blended. [NOTE: I've found that you can use less oil]
Put warm vegetables in a large bowl with beans and bell pepper; toss with dressing and cilantro. Taste and adjust seasoning if necessary. Serve warm or at room temperature, or refrigerate for up to a day.
Source: The New York Times (Mark Bittman), September 25, 2009