Frozen Margarita Pie

Preheat oven to 375 degrees F (190 degrees C).

Mix pretzels and sugar together in a bowl; stir in margarine until evenly incorporated.

Spoon mixture into a 9-inch pie plate; press into bottom and up sides of plate to form a firm, even crust.

Bake crust in the preheated oven until edges are lightly browned, about 5 minutes.

Cool on a wire rack.

Mix sweetened condensed milk, limeade concentrate, tequila, orange liqueur, and green food coloring in a large bowl.

Beat cream in a glass or metal bowl until soft peaks form.

Lift your beater or whisk straight up: the whipped cream will form soft mounds rather than a sharp peak.

Fold whipped cream into sweetened condensed milk mixture.

Spoon filling into cooled crust.

Cover pie with plastic wrap and freeze until firm, about 4 hours.

Let stand for 10 minutes before serving; garnish with lime slices.