Prepare the smoker, maintaining a temperature between 200F and 220F.

Melt butter in a cast-iron skillet or oven-safe baking dish.

Stir in grated sweet potatoes and flatten into an even layer.

Sprinkle brown sugar and salt evenly over the sweet potatoes.

Transfer the skillet to the smoker and cook for 1 hour.

Stir in 3 tablespoons of tequila and half of the lime juice.

Pat the sweet potatoes down again and continue smoking for 50 to 60 minutes, until tender with slightly crisp edges.

Remove the skillet from the smoker.

Stir in the remaining tequila and lime juice.

Serve warm.