Make the Strawberry 'Milk': Add the strawberries to a high-speed blender along with the milk, yogurt, maple syrup, vanilla, lemon juice, and salt. Blend on high for 45 to 60 seconds, until the berries are finely blended into the milk.

Mix: Add the oats and chia seeds to a large bowl and mix well. Pour the strawberry milk into the bowl, then add the chopped strawberries and stir until everything is combined. Let sit for at least 5 minutes to allow the oats and chia seeds to absorb some of the liquid. Then, mix again to incorporate the extra liquid sitting on top.

Store & Serve: Transfer the oatmeal to jars or other containers, then store in the fridge for at least 4 hours, preferably overnight. Top as desired and enjoy cold or warm; leftovers will keep in the fridge for up to 5 days.