Add coconut oil to a large pot over medium heat. Once the oil has melted, add onion, carrots, and garlic. Sauté for about 3 minutes, then add cumin, oregano, and chili powder. Sauté for an additional 5 minutes, then add broth, red beans, and tomatoes. Stir well and cover. Simmer on low heat for about 15 minutes. Turn off the heat and stir in spinach. Cover and let it wilt. Serve with a large salad.