Costa Rican Breakfast Bowl

Name: Costa Rican Breakfast Bowl
Cuisine: American, Latin American
Ingredients: 1/2 yellow onion, cut into 1/4-inch dice (about 1 cup); 1 medium red bell pepper, cored, seeded, and cut into 1/2-inch dice (about 1 cup); 1 teaspoon ground cumin; 1 teaspoon garlic powder; 1/2 jalapeño pepper, seeded and minced (optional); 1/2 bunch kale, stems removed and discarded, leaves shredded (about 2 cups); 2 cups cooked short- or long-grain brown rice; 1 (15-ounce) can black beans, rinsed and drained (about 1 1/2 cups); 3 tablespoons finely chopped fresh cilantro; Sea salt; 1 avocado, cut into 1/2-inch dice; 1 lime, cut into wedges