MIX pretzel crumbs and butter in 13x9-inch pan; press firmly onto bottom of pan. Refrigerate until ready to use.
COMBINE condensed milk, strawberries and lime juice in large bowl. Gently stir in whipped topping. Pour over crust.
FREEZE 6 hours or overnight. Remove from freezer about 15 min. before serving. Let stand at room temperature to soften slightly. Cut into 16 squares to serve. Top evenly with the strawberries.