CRUST:

1 1/2 c. crushed pretzel sticks
1/4 lb. butter, melted
1/4 c. sugar

Combine crushed pretzels and sugar. Add melted butter. Press into 9 inch buttered pie plate and chill.

FILLING:

1 (14 oz.) can sweetened condensed milk
1/3 c. fresh lime juice
2 tbsp. Tequila
2 tbsp. Triple Sec
1 (8 oz.) container Cool Whip
1-2 drops of green food coloring

Combine sweetened condensed milk, lime juice, Tequila and Triple Sec. Add food coloring if desired. Fold in Cool Whip. Pour into chilled crust and freeze for 3-4 hours. (Can be stored in freezer for several days.) Before serving garnish each piece with a thin slice of lime. Serves 8-10.

This is equally good without the Tequila and Triple Sec. Just increase lime juice to 1/3 cup plus 4 tablespoons.