Blueberry Walnut Overnight Oatmeal is a dream to whip up for holiday, company or weekend breakfasts. It reheats easily for quick wholesome breakfast meals during the week. This easy vegan, gluten free, slow cooker recipe is great cooked in a programmable crock pot since it only takes 5 hours to make. This healthy breakfast option uses steel-cut oats and is one of the most delicious ways to enjoy oatmeal ever!