Bring milk to boiling point, add quinoa and let boil over once more. Reduce heat, simmer for 15 minutes, and let quinoa absorb about three quarters of milk.
Stir in sugar and cinnamon, and cook until all liquid is absorbed, which should take about 10 minutes. Stir in berries, and leave for one more minute until they heat through.
Serve with milk, cinnamon and topped with berries