Combine the oats, brown sugar, salt, cinnamon and bananas with 5 1/2 cups water in the slow cooker. Stir to mix evenly.
Cover with a lid and cook on low until the oats soften, 6 to 8 hours. Before serving, remove the lid and let the oatmeal cool slightly before stirring. Adjust seasonings, as needed.
Serve in bowls topped with fresh berries and banana slices.
Recipe courtesy of Kelsey Nixon