Mash the avocado with lime juice, garlic powder, cumin, chili powder, salt, and pepper.
Toast the low carb bread.
Heat a nonstick skillet (use cooking spray or minimal oil). Fry eggs to your preference (over-easy or sunny-side up works best).
Mix cherry tomatoes, red onion, and cilantro in a small bowl.
Spread avocado mixture onto toast. Add a fried egg on top of each piece of toast. Spoon the tomato-onion mixture over the egg.