Frozen Margarita Mousse

Ingredients:

1 Can (14 ounces) Sweetened Condensed Milk
1/2 cup Ready-to-drink Margarita Mix
1 tbsp. Sugar
1-1/2 tsp. Grated Lime Zest
1 tbsp. Lime Juice
5 Drops Green Food Coloring (Optional)
1 Carton (8 ounces) Frozen Whipped Topping, thawed 

PRETZEL TOPPING:
1/3 cup Finely Crushed Pretzels
4 Tsp. Butter, melted
1 tbsp. Sugar
Lime slices

Directions:
Combine first five ingredients; mix well. If desired, add green food coloring; fold in thawed whipped topping.

For pretzel topping, combine pretzels, butter and sugar. Spoon lime mixture into 6 glasses; top each with about 1 tablespoon pretzel topping. Freeze until firm, 4-6 hours. Serve frozen with lime slices.