Prepare the pan: Line a 9x13 inch baking dish with parchment paper, leaving an overhang on the sides for easy removal.
Combine ingredients (except chocolate, strawberries, and vanilla): In a large saucepan, combine the sweetened condensed milk, butter, granulated sugar, heavy cream, and salt.
Cook the fudge: Cook over medium heat, stirring constantly, until the sugar is dissolved and the mixture comes to a boil. Continue cooking, stirring constantly, until the mixture reaches 234°F (112°C) on a candy thermometer (soft-ball stage). This will take about 10-15 minutes. Be careful not to let it burn.
Add chocolate and strawberries: Remove the saucepan from the heat. Immediately stir in the white chocolate chips until they are melted and smooth. Stir in the crushed freeze-dried strawberries and vanilla extract. Add a few drops of pink food coloring, if desired, to enhance the pink hue. Stir until the color is evenly distributed.
Pour into pan: Pour the fudge mixture into the prepared baking dish. Spread evenly.
Chill: Sprinkle the top with extra crushed freeze-dried strawberries, if desired. Cover and refrigerate for at least 2-3 hours, or preferably overnight, to allow the fudge to set completely.
Cut and serve: Once the fudge is firm, use the parchment paper overhang to lift it out of the dish. Cut the fudge into squares or desired shapes.