Grease slow cooker pot with coconut oil (or cooking spray).
Add oats, chia seeds, water, milk, cinnamon, vanilla, dash of salt and banana if using in slow cooker.
Place lid on slow cooker and cook for 6 hours on low for firm texture and 8 hours on low for softer texture. Alternatively, cook on high for 3-4 hours.
In morning, mix in ½ cup peanut butter and ½ cup jelly into oatmeal.
Serve with an additional drizzle of peanut butter and jelly, if desired.