Place a rack in the center of your oven and preheat the oven to 350 degrees F. In the bowl of a food processor fitted with a steel blade, pulse the pretzels until they form mostly fine crumbs with a few more textured pieces remaining throughout. If you do not have or prefer not to use a food processor, place the pretzels in a ziptop bag and crush them with a rolling pin (you may need to double up the bag if it gets any small holes).

Melt the butter in a large, heatproof bowl in the  microwave. Set 1/2 cup of the crushed pretzels aside, then add the remaining crumbs (about 1 3/4 cups) to the bowl with the melted butter. Add the brown sugar, then stir until evenly moist and combined. Press the crumbs into the bottom and up the sizes of a 9-inch pie dish. Bake for 8 minutes, until golden and fragrant. Set aside to cool slightly, then place in the freezer to cool quickly and completely. Do not proceed with the recipe until your crust and pie dish are at or below room temperature.

Set out the frozen yogurt and let it soften. DO NOT let the frozen yogurt get too liquidy or melty. It should be easily scoopable and soft but still retain some texture. Once it is ready, scoop the ice cream in a large mixing bowl (I used the same bowl I used for the crust—no need to wash in between). Fold in the reserved 1/2 cup crushed pretzels and diced strawberries. Spoon the mixture into the cooled crust and smooth the top with the back of a spoon or spatula.  Place in the freezer for at least 4 hours or overnight to firm.

To serve: remove from the freezer and let stand at room temperature for 10 minutes to soften (may be longer or shorter depending upon the brand of ice cream you purchased and the temperature of your freezer and kitchen). Slice and serve topped with sliced strawberries, additional chopped pretzels, and whipped cream.