Kaiserschmarrn Recipe (Fluffy Austrian Torn Pancake)

Ingredients

• 1 tablespoon unsalted butter, softened
• 1 tablespoon granulated sugar
• ¼ cup raisins
• 3 tablespoons dark rum
• 3 large eggs, whites and yolks separated
• Heaping ¼ teaspoon salt
• ⅓ cup granulated sugar
• ¾ cup milk
• 1 teaspoon vanilla extract
• ⅓ cup all-purpose flour
• 2 tablespoons unsalted butter, melted
• 1½ tablespoons unsalted butter
• 1½ tablespoons granulated sugar
• Macerated strawberries or other fresh fruit
• Confectioners' sugar, for dusting