Carb this recipe down by using cauliflower rice. Or if you want, use white rice instead of quinoa.
If you can't find gluten-free Worcestershire sauce, swap in coconut aminos.
For Whole30: Use cauliflower rice instead of quinoa; coconut aminos instead of Worcestershire; and guacamole instead of yogurt or sour cream.
For vegetarian: Omit beef and replace with ground tempeh or cooked beans (black beans, chickpeas, or pinto beans work best).