Clean and process your fruit, removing stems/seeds as needed.
Set a medium saucepan over medium heat and add the fruit and sweetener (start with a little; you can always add more later).
Heat fruit, stirring occasionally, until it begins to liquify, 5-15 minutes depending on your fruit. Allow the fruit to come to a boil, and let it continue to boil until it begins to break down and form a saucy consistency, about five minutes. If nccessary, carefully mash fruit with a fork or masher until it reaches the consistency you'd like.
Taste your jam and see if you want to add more sweetener. Add a tablespoon at a time until you hit the right sweet note for your tastes.
Stir in the chia seeds and let cook for another minute. Stir again, remove from heat, and let sit until thick, about 10 minutes. If the jam seems a little thin, add another teaspoon or two of chia seeds, stir, and let sit for another 10 minutes, but keep in mind that he jam will continue to thicken as it cools.
To store, place in an airtight jam jar or other container, and keep it in the refrigerator for up to two weeks. Can also be frozen for up to two months.