In a medium-sized bowl or jar, mix together rolled oats, your choice of milk, Greek yogurt, fresh or thawed raspberries, honey, and white chocolate chips. Stir until all ingredients are well incorporated, ensuring the oats are fully submerged in the liquid.

Cover the bowl or jar tightly with a lid or plastic wrap, then place it in the refrigerator. Allow the mixture to chill overnight, or for at least 6-8 hours.

When you're ready to enjoy, give the mixture a good stir to blend everything evenly. Add more milk if you prefer a looser texture. Serve in a bowl or enjoy directly from the jar.