Preheat the oven to 350°F. In a large bowl mix together the crushed pretzels, melted butter and brown sugar. Press into a greased pie pan or 9x9 round spring-form pan. Bake 5-8 minutes then set aside to cool completely.
Meanwhile, use a hand mixer to whip together the cream cheese and sugar. Fold in the Cool Whip until it reaches a smooth texture. Pour the mix into the pie base. Chill 8-10 hours or overnight, until firm.
When the cheesecake base is set, prepare the strawberry gelatin according to the quick set instructions on the box. Pour the Jell-o slowly over the cheesecake base until it fills all the way up the sides (you may have some leftover gelatin mix). Place in the fridge and chill until the gelatin has set or for at least two hours.
After the strawberry gelatin topping is set, decorate the top of the pie with the sliced strawberries, whipped cream and whole pretzels. Serve right away, cover and chill leftovers for 2-3 days. Enjoy!