Grilled Polenta with Sweet and Spicy Beans

Ingredients

• 1 tablespoon high-heat oil, plus additional for grilling
• 1/2 cup minced onions
• Salt and pepper, to taste
• 1 green bell pepper, seeded and chopped
• 2 cloves garlic, minced
• 1 teaspoon cumin
• 1 teaspoon oregano
• 1 (14-ounce) can black beans, rinsed and drained
• 1 (14-ounce) can pinto beans, rinsed and drained
• 1 (14-ounce) can diced tomatoes
• 2 chipotle peppers in adobo sauce, chopped
• 2 tablespoons brown sugar
• 1 tablespoon red wine vinegar
• 3 tablespoons chopped fresh cilantro
• 1 (18-ounce) log prepared polenta, sliced
• Shredded pepper jack cheese