Heat 1 tbsp oil in a skillet over med-high, pat dry beef, season with salt/pep + 1-2 tsp taco seasoning; add to pan in one layer + sear 2 min; flip + cook 1 more min (for well done add 1 min more)

Cut onion in half from root to stem, peel + thinly slice ½ (or whole) onion

Stack 4 tortillas on a plate + wrap with a damp paper towel; microwave 15-30 sec or until warm + soft; add steak + onions to tortillas

Pour container of queso into a small pot; heat over medium 2-3 min until hot; drizzle onto tacos—tasty!