Place ground beef in a large skillet over medium-high heat and cook until browned, approximately 7-9 minutes.

Drain rendered fat from the skillet and return to heat.

Add taco seasoning and water to the beef; simmer for 5 minutes until the liquid has reduced and coated the meat.

In a separate small mixing bowl, whisk together sour cream, lime juice, lime zest, and salt until smooth.

Heat vegetable oil in a flat griddle or large skillet over medium heat.

Place a corn tortilla in the skillet and immediately layer 1/4 cup of cheese and 2 tablespoons of beef onto one half.

Fold the tortilla over the filling and press down with a spatula.

Fry for 2 minutes per side until the shell is golden brown and crispy.

Repeat process for remaining tortillas.

Garnish with lettuce and tomatoes, then drizzle with the creamy lime sauce before serving.