Really Good Key Lime Pie

Name: Really Good Key Lime Pie
Cook time: 6 h 50 min
Total time: 6 h 50 min
Cuisine: American
Ingredients: 6 ounces (170 grams) graham crackers, broken into 1-inch pieces (about 11 crackers); 2 ounces (57 grams) mini pretzel twists (about 35 twists); ¼ cup packed (1¾ ounces/50 grams) light brown sugar; ¼ teaspoon table salt; 8 tablespoons unsalted butter, melted; 1½ cups sweetened condensed milk; ¾ cup lime juice (6 limes); 6 tablespoons heavy cream; 4 large egg yolks; ⅛ teaspoon table salt; 2 large egg whites; ¼ teaspoon cream of tartar; ½ cup (3½ ounces/99 grams) granulated sugar; ¼ cup water; 1 tablespoon vanilla extract; 2 teaspoons grated lime zest