Core the apples and chop into bite sized chunks. Add to a saucepan along with the juice of the orange (leave the zest aside for the crumble), grated ginger, cinnamon and nutmeg.
Bring to the boil then reduce the heat to its lowest setting, cover pot with a lid and simmer for 5-6 minutes until the apple is soft. Take off the heat and allow to cool fully.
Meanwhile, heat the oven to 180ºC. Pour the seeds onto a tray and heat up for about 10 minutes until they start to turn golden.
Add the seeds to a food processor and process until they are broken up, then add the medjool dates and oil in and blend until it forms into a paste.
Pour into a bowl, then add the oats and spices and using your hands work into a crumble mixture.
Turn onto a baking sheet lined with parchment paper and bake for 10 -12 minutes until the mixture is golden in colour, remove from the oven and leave to cool.
To assemble your jars, firstly add a few tablespoons of the apple mixture, then layer on the crumble before topping with yogurt.
To decorate sprinkle a little more of the crumble on top.