Add the pretzels to the bowl of a food processor and pulse until finely ground. (See Kelly’s Note.) Add the pretzels to a medium bowl then stir in the melted butter until the mixture is well-combined. Set aside.
In the bowl of a stand mixer fitted with the paddle attachment (or using a handheld mixer), beat the cream cheese until smooth. Add the heavy cream, lemon zest, lemon juice, sugar and vanilla extract and beat until smooth and creamy.
Divide the pretzel mixture among serving cups, reserving a portion to sprinkle atop the cups as garnish.
Spoon the cream cheese mixture on top of the pretzels. (Alternately, transfer it to a piping bag or plastic bag, snip off the tip and pipe the mixture into the cups.)
Spoon the chopped strawberries atop the cream cheese mixture.
Spoon the whipped cream atop the strawberries then garnish with the reserved pretzel crumbs. Serve.