Add diced tomatoes, red onion, jalapeño and cilantro to a mixing bowl. Pour in fresh lime juice and add salt. Gently mix everything together. Let the salsa rest while you prepare the seasoned beef.

Place a large skillet over medium heat. Add olive oil and let it warm for about one minute. Avoid overheating the oil. A medium temperature helps the beef cook evenly without burning the seasonings.

Add chopped onion to the warm skillet. Cook for two to three minutes until softened. Add minced garlic and cook for another 30 seconds. Stir often to prevent the garlic from becoming bitter.

Add the ground beef to the skillet with the softened vegetables. Break the meat apart using a wooden spoon. Cook until it is completely browned and no longer pink. Drain excess grease if needed.

Sprinkle chili powder, cumin, paprika, oregano, salt, and black pepper over the cooked beef. Stir everything together until the meat is evenly coated. Cook for another two minutes to help the spices become fragrant.

Taste the salsa after it has rested for several minutes. Add more lime juice or salt if needed. Gently fold in the diced avocado. Avoid stirring too much because the avocado can become mashed.

Spoon the warm seasoned beef onto serving plates or bowls. Add a generous amount of fresh salsa on top. Serve immediately while the beef is warm and the salsa remains fresh and crisp.