Strawberry Pretzel Salad

Name: Strawberry Pretzel Salad
Ingredients: FOR THE PRETZEL CRUST; 2 cups very crushed salted pretzel snaps; 1/4 cup granulated white sugar; 3/4 teaspoon kosher salt; 1 cup unsalted butter, melted; FOR THE FILLING; 1 (6-ounce) package strawberry Jell-O; 2 cups boiling water; 2 (8-ounce packages) cream cheese, softened; 1/2 cup granulated white sugar; 1/2 teaspoon vanilla extract; 1/4 teaspoon cream of tartar; 1/4 teaspoon kosher salt; 1 1/2 cups heavy cream, chilled; 1 pound strawberries, hulled and sliced