Heat oven to 350°F Mix pretzels, 1/4 cup sugar and margarine; press onto bottom of 13x9 inch pan. Bake 10 minutes. Cool.
Beat cream cheese, remaininf suar and milk until blended. Stir in Cool Whip; spread over crust. Refrigerate.
Add boiling water to jelly powder powder in large bowl; stir 2 minutes until completelyu dissolved. Stir in cold water. Refrigerate 1-1 1/2 hours or until thickened (spoon drawn through leaves definate inpression). Stir in strawberries; spoon over cream cheese layer. Refrigerate 3 hours or until firm.
MAKE IT EASY: Substitute 1 package (600g) frozen whole strawberries, sliced, for the fresh strawberries. Stir into jelly powder along with the cold water. Refrigerate 10-15 minutes, or until thickened; spoon over cream cheese layer. Continue as directed.