In a jar, combine the chia seeds, oats, and milk. Mix well and stick in the fridge to soak overnight or for at least 4 hours.
Combine raspberries, honey, and lemon juice in a jar. Use a fork or the back of a spoon to mash the mixture together until it creates a jam-like consistency (if using frozen raspberries thaw under hot water first). Place mixture in the fridge, covered.
In the morning, mix the overnight oats to evenly combine.
Use two glass jars and layer the items: begin with a layer of the chia oat mixture, top that with raspberry jam, a layer of sliced banana, then a thin layer of nut butter, and repeat. Alternatively, arrange the chia mixture, raspberry jam, bananas and nut butter in a bowl. It’s your call!
Notes
Make ahead tip: Double the recipe if you want to enjoy throughout the week! It will last fine in the fridge.