Special equipment: a 6-quart slow cooker
Combine the oats, nutmeg, bananas and cinnamon stick in a 6-quart slow cooker with 7 1/2 cups water and 1/8 teaspoon salt. Cook on low for 8 hours.
Serve the oatmeal with your desired toppings.
For toasted sliced almonds: Add 1/3 cup sliced almonds to a dry skillet and toast over medium heat, shaking the skillet frequently, until golden brown, 3 to 5 minutes. For toasted shaved coconut: Add 1/3 cup shaved coconut to a dry skillet over medium heat. Toast until lightly browned, 1 to 2 minutes.