01 - Combine diced pineapple, granulated sugar, and lemon juice in a saucepan. Cook over medium heat for 5 minutes, stirring occasionally, until the pineapple softens and sugar is fully dissolved. Allow mixture to cool to room temperature.
02 - Puree the cooled pineapple mixture in a blender or food processor until completely smooth.
03 - In a large bowl, whisk together heavy cream, whole milk, vanilla extract, and salt until evenly mixed. Incorporate the pineapple puree and stir until well combined.
04 - Cover the bowl and refrigerate for at least 2 hours until thoroughly chilled.
05 - Pour the chilled mixture into an ice cream maker and churn according to the manufacturer's instructions, typically 20 to 30 minutes, until thickened and creamy.
06 - Transfer the ice cream to a freezer-safe container, cover, and freeze for a minimum of 4 hours until set and scoopable.
07 - Let the ice cream stand at room temperature for 5 minutes before scooping and serving for optimal texture.