In a mason jar or an airtight container, add old-fashioned rolled oats, protein powder, and chia seeds. Pour in your milk of choice and stir in plain non-fat Greek yogurt. If you prefer a hint of sweetness, drizzle in your natural sweetener and mix until well combined.

Secure the lid tightly on the container and place it in the refrigerator for at least 5 hours or overnight.

In the morning, stir the mixture and add your desired flavor variation: fold in chopped strawberries, mix in cocoa powder, banana slices, and peanut butter, or swirl in jelly and extra peanut butter.

Spoon the oats into a bowl or enjoy directly from the jar. You can serve cold or warm them in the microwave for 30-60 seconds, adding milk if needed.