
Heat olive oil in a large pot. Add onion, bell pepper, and garlic, and sauté for 5-10 minutes. Add red pepper flakes, cumin, paprika, oregano, tomato paste, and bay leaves, and sauté for another minute.
Stir in lentils, black beans, kidney beans, vegetable broth, crushed tomatoes, salt, and pepper. Bring to a boil. Then lower the heat and simmer for 40 minutes, stirring occasionally. Stir in balsamic vinegar.
Serve over rice, topping the chili with grated cheese and cilantro. Enjoy!