In a mason jar or airtight container, combine the rolled oats, milk, Greek yogurt, honey or maple syrup,pistachio paste, chia seeds, vanilla extract,
Stir well to ensure all ingredients are evenly mixed.
Seal the jar or container and refrigerate overnight, or for at least 4 hours, to allow the oats to soften and the flavors to meld together.
In the morning, give the oats a good stir. If the mixture is too thick for your liking, you can add a splash of milk to achieve your desired consistency.
Top with additional chopped pistachios, sliced banana, and a drizzle of honey, if desired.
Enjoy your creamy pistachio overnight oats straight from the jar or transfer them to a bowl for an extra touch of morning elegance.