Let the vegetables cook for 1 to 2 more minutes, then add 1 can of diced tomatoes and spices. Let the tomatoes and vegetables simmer for 2 to 3 minutes, then add vegetable broth, lentils, kale leaves, and brown rice. Stir all the ingredients into the soup and let it simmer for 40 to 50 minutes. Add any additional salt, pepper, or spices to taste. Turn off the heat and enjoy!