Lime Semifreddo with Pretzel Crust Recipe

Ingredients (11)

• 1 cup pretzel crumbs (about 2 cups of small pretzel sticks)
• 5 tablespoons unsalted butter, melted
• 2 tablespoons light brown sugar
• 1 (14-ounce) can sweetened condensed milk
• 1/2 cup lime juice
• 2 teaspoons finely grated lime zest
• 1 cup sugar
• 1/4 cup water
• 2 tablespoons light corn syrup
• 4 large egg whites, at room temperature
• 1/4 teaspoon salt