Add oats, milk, chia seeds, maple syrup and vanilla extract to jar/bowl with lid and place in fridge overnight (or for at least 4 hours).
Top the overnight oats with yogurt, chia jam (if using), and strawberries.
Notes
Layered option: You can layer the ingredients before serving if you'd like. Take the oat mixture and add it to the bottom of a glass or jar, add a layer of yogurt, a layer of chia jam, a few strawberries, another layer of the oat mixture, some more yogurt, and a few more strawberries. I love serving it this way when I have people over for breakfast/brunch.