Add 5 cups water and 1/4 teaspoon salt to a large saucepan or stock pot. Bring to a boil on your stovetop over medium-high heat.
While the water is heating up, chop your apples into small chunks. You may peel your apples beforehand if you wish, but this isn't necessary.
Once the water boils, add the oats, chopped apples, cinnamon, nutmeg, maple syrup, and vanilla extract to the pot.
Stir the ingredients. The oatmeal will begin to thicken and start to bubble.
Once the oatmeal starts to bubble, turn the stovetop heat to low and allow it to thicken for 3-4 minutes. This time will allow the apples to soften as well.
Once thickened, scoop the oatmeal into bowls. Add 1/4 cup heavy cream or milk to each bowl. This adds extra creaminess (and healthy fats!) to the dish. It's completely optional!
Enjoy!