In a large bowl, use a hand mixer to whip the heavy cream until stiff peaks form.
2 cups heavy whipping cream
Gently fold in the sweetened condensed milk, vanilla extract, and salt until well combined. Set aside.
14 ounces sweetened condensed milk, 2 teaspoons vanilla extract, ¼ teaspoon salt
Split the mixture evenly into three separate bowls. Leave one bowl plain for the vanilla layer. Mix the cocoa powder into the second bowl for the chocolate layer.
2 tablespoons cocoa powder
Stir the strawberry purée into the third bowl, adding a few drops of red food coloring if you want a brighter pink hue.
½ cup strawberry puree, Red food coloring
Using cake cardboard or strips of parchment paper as dividers, layer the chocolate, vanilla, and strawberry mixtures side by side in a loaf pan.
Cover tightly with plastic wrap and freeze for at least 5 hours, or overnight, until firm.
Once frozen solid, remove the dividers. Gently press the three sections together with a flat surface to seal the layers.