Scott Thompson's Strawberry Pretzel Salad

3/4 cup melted margarine
3 Tbsp sugar
2 cups crushed pretzels
8 oz cream cheese
1 cup sugar
8 oz whipped topping
2 cups boiling water
2 (3-oz) packages strawberry gelatin
2 (10-oz) packages frozen strawberries

Mix margarine, 3 Tbsp sugar and crushed pretzels in 9x13 inch cake pan. Bake at 300 degrees for 9 minutes then cool. Combine cream cheese, 1 cup sugar and whipped topping, and spread over cooled crust in pan. Dissolve gelatin in boiling water, then add frozen strawberries. Let the gelatin mixture set until almost firm, then pour over cream cheese mixture and refrigerate.