In a mixing bowl, combine the oats, cultured cottage cheese, frozen mixed berries, real milk, and vanilla protein powder.

Stir until well combined, ensuring that the protein powder is evenly distributed throughout the mixture.

Transfer the mixture to an airtight container or mason jar.

Sprinkle the walnuts and cinnamon over the top of the oats.

Cover and refrigerate overnight, allowing the flavors to meld and the oats to soften.

In the morning, give the oats a good stir and enjoy cold or heated in the microwave for a warm, comforting breakfast.