In a small saucepan, add the strawberries and maple syrup. Simmer for about 20 minutes, and mash together with a fork.
Remove from the heat and stir in the chia seeds. Set aside to thicken and cool.
On a lightly floured surface, roll out the pie crust to about ¼ inch thick and cut it out using a 3.5 - 4 inch heart cutter. You should be able to cut out 24 hearts. Use a rolling pin to roll back over the hearts a little bit to make them a bit bigger.
Fill 12 hearts with a heaping tablespoon of the strawberry mixture. Top with the remaining hearts and use the tines of a fork to crimp the edges all the way around. Cut a small slit in the top of the heart.
Brush the hearts with the egg wash and bake for 22-27 minutes, until golden brown.
Prepare the icing by mixing all of the ingredients together.
Allow to cool for 10-15 minutes, then drizzle with the icing.