Peel and core the apples; chop into ½-inch pieces (or whatever size you prefer).

In a medium saucepan (I use a 3-quart saucepan), melt the butter over medium heat.

Add the chopped apples and cinnamon; stir to combine. Cook, stirring occasionally, until the apples begin to soften, about 4 to 5 minutes. Note: The apples will continue to cook and soften with the oatmeal, so don't take them too far at this point so they don't end up mushy.

Add the milk, oats and salt; stir to combine. Increase the heat and bring the mixture to a boil (note: don't walk away; keep a close eye on the pot because the milk can quickly boil over if you're not paying attention). Immediately reduce the heat and simmer, stirring occasionally, until the oats have softened and most of the liquid has been absorbed, about 6 to 8 minutes.

Stir in the maple syrup; serve.