Gather all your ingredients on the countertop for easy access.

In a medium mixing bowl, combine rolled oats, Greek yogurt, milk, chia seeds, and sweetener. Whisk together until well incorporated.

Gently fold in your preferred fruits and nuts to customize your mixture.

Transfer your mixture into airtight containers or a large jar and refrigerate for at least 4 hours or overnight.

Before serving, stir the oats and adjust the consistency with a splash of milk if needed.

Add extra toppings like fruits or nuts before enjoying.