In a bowl mix together crushed pretzels, melted butter and sugar
Press pretzel mix into a 13x9 baking pan
Bake for 10 minutes ,remove from oven and cool completely
Lime Layer
Dissolve Lime Jell-O in 1 cup boiling water- refrigerate until partially set -30-45 minutes.
In a separate bowl beat 1 package of cream cheese until smooth, beat in lime Jell-O ,fold in 1 tub of whipped topping and green food coloring if desired.- spread evenly over pretzel crust. Refrigerate for 45minutes to an hour until set.
Cream Cheese Layer
Beat cream cheese and sugar until smooth, fold in second container of whipped topping. Spread over lime layer. Refrigerate for 30-45 minutes until set.
Strawberry Layer
In a large bowl dissolve strawberry Jell-O into boiling water. Refrigerate until partially set. Stir in frozen strawberries and spread over cream cheese layer. Cover with plastic wrap and refrigerate 2-3 hours until firmly set.
Cut into squares and serve with optional additional whipped cream.