01 - Combine pineapple, granulated sugar, and lemon juice in a saucepan. Cook over medium heat for 5 minutes until pineapple is softened and sugar has dissolved. Allow 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, vanilla extract, and salt until well combined. Fold in the pineapple puree until thoroughly integrated.
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 and churn according to manufacturer's instructions, typically for 20 to 30 minutes, until thick and creamy.
06 - Transfer the churned ice cream to a freezer-safe container, cover, and freeze for at least 4 hours or until firm.
07 - Allow ice cream to rest at room temperature for approximately 5 minutes to soften slightly before scooping and serving.