Strawberry Pretzel Salad

Well, when I made this recently, I combined two different recipes that I have, so I will try to consolidate this as much as possible.

2 cups finely crushed pretzels
2/3 cup melted butter
2 tbsp. sugar

8 oz. cream cheese
12 oz. cool whipped topping
1/4 cup sugar

2 boxes sugar-free strawberry Jello
4 cups fresh strawberries, diced (or one bag of frozen strawberries, diced)
2 cups boiling water
1 1/2 cups cold water (for fresh strawberries only)

1. Heat oven to 350 degrees.
2. Mix pretzels, sugar, and butter - press into at 9x13 pan. Bake 10 minutes. Cool.
3. Beat cream cheese, sugar, and cool whip. Spread over crust. Refrigerate.
4. Add boiling water to Jello mix in a large bowl. Stir until completely dissolved.
If using fresh strawberries, add cold water. Refrigerate jello until slightly thickened, then stir in fresh berries. Spoon over cream cheese layer.
If using frozen berries, fold slices into warm Jello - cool slightly, then pour over cream cheese layer.
5. Refrigerate entire dessert to set up (probably 3 hours).