01 - Combine diced pineapple, granulated sugar, and lemon juice in a saucepan. Cook over medium heat for 5 minutes until the pineapple softens and sugar is fully dissolved. Remove from heat and let 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 heavy cream, whole milk, vanilla extract, and salt until blended. Fold in the pureed pineapple mixture until fully incorporated.
04 - Cover the bowl and refrigerate for at least 2 hours to thoroughly chill the mixture.
05 - Pour the chilled mixture into an ice cream maker. Churn according to manufacturer’s instructions, usually 20 to 30 minutes, until thick and creamy.
06 - Transfer the churned mixture to a freezer-safe container. Cover tightly and freeze for at least 4 hours, or until firm.
07 - Allow ice cream to stand at room temperature for 5 minutes before scooping and serving.