Brown the ground beef in a skillet over medium-high heat, breaking apart as it cooks, about 8 minutes, until no longer pink. Visually check for small crumbles and a lightly browned surface.

Drain excess fat, then stir in taco seasoning, water, and salt and pepper. Bring to a simmer.

Simmer the beef mixture for 5 minutes, stirring occasionally, until thickened and evenly coated. Look for a glossy, clinging consistency.

Brush both sides of the corn tortillas lightly with olive oil. You should see a thin sheen across each tortilla surface.

Fold each tortilla in half and arrange on a sheet pan, spaced so they crisp rather than steam. Use a single layer for best golden edges.

Bake at 400°F for 8-10 minutes until crisp and golden. Watch the edges turn dark golden brown.

Fill each taco shell with seasoned ground beef. Pile the filling near the center so it won’t spill out.

Top the tacos with shredded cheddar cheese, then add shredded lettuce, diced tomatoes, and diced onion. Spread toppings lightly so the shells stay crunchy.

Drizzle with sour cream and salsa and serve immediately. The contrast should be visible: warm filling against bright, fresh toppings.