Preheat oven to 350 °F.
Open the can of coconut milk. Pour off the coconut water into a bowl or container. Save both the coconut water and the coconut cream remaining in the can.
Peel mango and remove the pit. Puree the mango, sugar and ½ cup of the coconut water in a high-speed blender or food processor.
Add the coconut cream and soy milk and blend until smooth.
Add the egg replacer and mix briefly.
Pour the mixture into the tart shell.
Bake the tart for 40 minutes.
While the tart is baking, prepare the apricot glaze. Heat the apricot jam in a saucepan over low heat with just enough water to achieve a runny consistency. Add cardamom to taste.
After the 40 minutes bake time, take the tart out of the oven. Place the apricots a few at a time into the pan to coat them with the apricot glaze. Arrange them in a circular pattern on top of the custard.
Return the tart to the oven and bake for another 15 minutes or until the custard is just set.