Heat vegetable oil in a large skillet over medium-high heat. Add the ground beef and cook until browned, breaking it into small pieces with a spatula.

Drain excess fat from the skillet. Add the taco seasoning and 1/4 cup of water. Stir well and simmer for 5 minutes until the mixture thickens.

Warm the tortillas according to package instructions, either in a dry skillet or microwave.

Assemble the tacos: Spoon the seasoned beef onto each tortilla. Top with shredded lettuce, diced tomatoes, onions, and shredded cheese.

Add a dollop of sour cream and a sprinkle of chopped cilantro. Serve with lime wedges on the side.

Enjoy immediately while warm. Customize with additional toppings like avocado, jalapeños, or hot sauce if desired.