Step 1

Heat fruit in a small saucepan over medium-high heat, stirring occasionally, until the fruit is heated through and begins to break down and bubble.  Use a spoon or potato masher to mash the fruit to your desired consistency.

Step 2

Stir in the chia seeds and lemon juice until combined.  Then taste, and stir in 1 or 2 tablespoons sweetener if needed.

Step 3

Remove from heat and let cool for 5 minutes.  (The jam will thicken considerably as it cools.)

Step 4

Give the jam one final good stir.  Then serve immediately, or transfer to a sealed container and refrigerate for up to 1 week, or freeze for up to 3 months.