1. Mash the banana in a container using a fork to help.
2. Incorporate the oats and nut cream thoroughly, blending thoroughly.
3. Put greaseproof paper along the edge of a metal ring and set it on a plate.
4. Transfer the blend into the ring and compress, forming the foundation. Reserve.
5. Using a hand blender, blend together the yogurt, blueberry jam, coconut, and chia seeds in a separate container.
6. Fill the ring with the mixture, placing it above the base.
7. Reserve in the refrigerator overnight.