Peel the banana. Place it in a large bowl and mash it with a fork.
Add the plant milk, oats, flaxseed, chia seeds, and maple syrup to the bowl. Stir well.
Cover the bowl or transfer the mixture into 3 small storage containers and cover. Refrigerate the mixture for 6 to 8 hours, or overnight.
Serve: Add your desired toppings. Serve chilled.
Notes
This recipe gets a touch of natural sweetness from the banana and maple syrup, but it is deliberately not overly sweet. This is so it compliments the toppings without overpowering them. If you prefer your overnight oats on the sweeter side, a touch more maple syrup should do the trick.
Feel free to experiment with the suggested toppings or others! I prefer to mix something crunchy (like granola) with something sweet (like fresh fruit).
Plant-based overnight oats will keep well in the fridge for about 4 days. I recommend storing the toppings in a separate container and only adding them when you’re ready to serve.