In a small bowl or jar (I find it’s easier to mix in a bowl), combine oats, chia seeds, salt, syrup, 1/2 cup milk, and 1-2 Tbsp. blueberries, and 1/8 tsp. cinnamon. Stir to combine, then taste and add additional cinnamon, syrup, or milk as desired.
Transfer to a jar or container and cover. Refrigerate at least 30-40 minutes, up to overnight.
To serve, add a little drizzle of milk, if needed, then top with remaining blueberries. Feel free to add extras like granola, sliced almonds, or a drizzle of almond or peanut butter!