Combine quinoa, milk, and water in a large saucepan over medium-high heat. Bring to a boil.
Reduce heat to low and simmer for 20-25 minutes, stirring occasionally, until quinoa is tender and mixture has thickened.
Stir in maple syrup, cinnamon, nutmeg, vanilla, and salt. Mix well.
Let cool completely, then transfer to an airtight container and refrigerate overnight.
Christmas morning, reheat individual portions in the microwave for 1-2 minutes or on the stovetop with a splash of milk until warm.
Serve warm with your favorite toppings and an extra drizzle of maple syrup.