Peel and core pineapple. Dice into tiny pieces. Add sugar and stir. It will become juicy as the fruit and sugar mix together.
Pulse mixture with an immersion blender or mash with a potato masher to break down fruit. If you want chunks, mash slightly. If you want it smoother use a blender or immersion blender. Add lemon juice. Let sit 10 minutes.
Combine pectin and water in small saucepan. Bring to a boil and boil for 1 minute, stirring constantly. Pour over fruit mixture.Stir for 3 minutes to allow sugar to dissolve.
Pour into clean jars and add lids. Let sit on counter for 24 hours (or until set).Refrigerate up to 3 weeks or freeze up to 1 year.
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Notes
When you’re ready to thaw a jar simply place it in the refrigerator to thaw before using. This recipe makes 5-6 cups of jam. Calories are based off of a 1 Tbsp. serving.