01 - Combine diced pineapple, granulated sugar, and lemon juice in a saucepan. Cook over medium heat for 5 minutes, stirring gently until pineapple softens and sugar dissolves. Remove from heat and cool to room temperature.
02 - Transfer the cooled pineapple mixture to a blender or food processor and process until completely smooth.
03 - In a large bowl, whisk together heavy cream, whole milk, vanilla extract, and salt. Incorporate the pineapple puree and blend until fully combined.
04 - Cover the bowl and refrigerate for at least 2 hours, allowing the mixture to become fully chilled.
05 - Pour the chilled mixture into an ice cream maker and churn following the manufacturer's instructions, typically 20 to 30 minutes, until the mixture thickens and reaches a creamy consistency.
06 - Transfer the churned ice cream into a freezer-safe container. Cover and place in the freezer for a minimum of 4 hours or until fully set and firm.
07 - Before serving, let the ice cream stand at room temperature for 5 minutes to soften slightly. Scoop into bowls or cones and enjoy.