01 - Combine pineapple, granulated sugar, and lemon juice in a saucepan. Cook over medium heat for 5 minutes until the pineapple softens and sugar dissolves. Allow the mixture to cool to room temperature.
02 - Transfer the cooled pineapple mixture to a blender or food processor. Blend until completely smooth.
03 - In a large bowl, whisk together heavy cream, whole milk, pure vanilla extract, and salt. Incorporate the pineapple puree, mixing until fully combined.
04 - Cover the bowl and refrigerate the mixture for at least 2 hours until thoroughly chilled.
05 - Pour the chilled mixture into an ice cream maker. Churn according to the manufacturer's instructions, typically 20 to 30 minutes, until thick and creamy.
06 - Transfer the churned ice cream to a freezer-safe container. Cover and freeze for a minimum of 4 hours or until firm.
07 - Let the ice cream stand at room temperature for about 5 minutes before scooping and serving.