Cook the ground beef in a skillet over medium heat until browned. Drain excess fat.

Add taco seasoning and a bit of water to the beef, stir well, and let it simmer for a few minutes.

Warm the taco shells according to the package instructions.

Fill each taco shell with a layer of cooked beef.

Top with shredded lettuce, sliced onions, grated cheese, and salsa.

Serve immediately.