Heat a large skillet over medium to medium-high heat and add 1 tablespoon olive oil.
Add the diced 1/2 medium onion, 1/2 tsp salt, 1/4 tsp black pepper, 1/4 tsp garlic powder, and 1/4 tsp paprika; cook, stirring occasionally, about 5 minutes until the onion is softened.
Add 1 pound ground beef to the skillet and break it up with a spatula; cook about 5 minutes until most of the beef is browned.
Stir in 3 tablespoons salsa verde and continue cooking about 3 minutes until the beef is fully browned and juicy; remove from heat and stir in or sprinkle 1 teaspoon chopped fresh cilantro.
To make cheesy tortillas, heat a clean pan over medium heat, sprinkle about 1 tablespoon shredded Mexican blend cheese onto the pan, place a tortilla on top, and cook until bubbles form; flip and cook the other side until lightly crisp.
Assemble tacos by filling each tortilla with 1–2 tablespoons of the beef mixture, then top with avocado slices and extra salsa as desired; serve with lime wedges.