Saute Vegetables: In a big pot, heat olive oil then add chopped onions, garlic and bell peppers. Cook until softened and fragrant.
Brown the Meat: Place the ground beef in the pot and crumble it with a spoon. Season with salt, pepper and Italian seasoning and cook until browned.
Add Tomatoes & Broth: Add diced tomatoes and beef broth, stirring well. Bring it to the gentlest of boils and then turn down to a simmer.
Simmer Soup: Let soup simmer for 20 minutes so flavors blend and peppers are completely softened.
Add Cauliflower Rice: Stir in cauliflower rice and cook for 5-7 minutes, until tender but not mushy.
Rest & Serve: Take off the heat, let the soup rest for 5 minutes, add parsley and serve hot.