Place the sliced strawberries and water in a saucepan over medium heat. Bring to a slow simmer. Once simmering, lower the heat to medium-low and simmer for 15 minutes, stirring occasionally.

Using a potato masher, fork, or spoon, mash the strawberries well.

Continue cooking until reduced by half, about 30 minutes, stirring occasionally.

Grind the chia seeds and add them to the strawberries. Stir well.

Cool completely before serving.

Store leftovers in in an airtight container in the fridge.