Add fruit, lemon juice, lemon zest, and maple syrup to a small saucepan and cook over medium-high heat. Cover. Stir occasionally until fruit begins to thicken, about 10 minutes.
Uncover and bring mixture to a boil until it develops a sauce-like consistency, about 5 minutes.
Stir in chia seeds and cook 2 more minutes. Stir again and then remove from heat.
Transfer jam to an airtight jar or other container and allow to cool, or refrigerate 2–3 hours before use. The jam will continue to thicken. Can be stored in refrigerator 2 weeks or frozen up to 2 months.