Combine and chop bell pepper, onion, garlic, and kale in a food processor. Remove from food processor and water-sauté mixture in a small amount of water until veggies are very tender. Add beans, tomatoes, carrots, ½ cup salsa, chili powder, cumin, and red pepper flakes. Stir to combine and simmer until most of the tomato liquid evaporates. Remove from heat.