Heat a large Dutch oven or soup pot with the olive oil over medium heat. Once hot, add the ground beef and brown one side for 3-4 minutes before breaking apart and fully cooking.
Add the chili seasoning, frozen cauliflower rice blend, and crushed tomatoes, stirring everything together.
Stir in the beef broth and bring to a boil before reducing the heat, covering, and simmering for 45-60 minutes before serving. The longer the soup simmers, the more flavors will develop.
Serve with shredded cheese, pico de gallo, sour cream, and tortilla or corn chips.
Notes
*I used Trader Joe's Mexican-Style riced cauliflower. Other options include Green Giant spicy Mexican style cauliflower rice, Veggieful southwest cauliflower rice, Bird's Eye Spanish cauliflower rice, or plain cauliflower rice with added frozen fajita veggies (onions and peppers). You can also add fresh poblano or bell peppers to the beef. See my Instant Pot stuffed pepper soup for an example.