For the lowest carbs, choose a taco seasoning that is specifically labeled sugar free or make your own with chili powder, cumin, smoked paprika, garlic powder, onion powder, salt, and pepper. If making these ahead for meal prep, store the taco beef separately in the refrigerator for up to 3 days and slice fresh avocados just before serving to keep them vibrant and creamy. To keep net carbs in check, use cherry tomatoes sparingly and remove excess seeds and juice before dicing. These bites work well as a main dish for two people who are extra hungry or as four smaller servings for appetizers or light meals.