Combine oats, milk, yogurt, chia seeds, and salt in a bowl or jar and mix thoroughly to ensure even hydration and consistent texture throughout the mixture.
Add sweetener and vanilla extract, stirring well so the flavors are evenly distributed before refrigeration.
Transfer to airtight containers and refrigerate for at least 6–8 hours to allow the oats to soften and absorb the liquid fully.
Stir the mixture in the morning and adjust the consistency with a small amount of milk if needed for a smoother texture.
Add toppings just before serving to maintain freshness and enhance both flavor and presentation.