In a hot saucepan, add the steel-cut oats and cook until fragrant, stirring often, about 2 minutes (this step enhances the flavor of the oats).
Add the apple chunks, water and salt. Stir to combine, and raise the heat to high to bring the mixture to a simmer. Reduce heat to medium-low and cook for about 35 minutes, until almost all of the liquid has been absorbed.
Remove from heat and let the oatmeal rest for 5 minutes before serving so it has more time to thicken up.
Serve with your choice of toppings: dates, raisins, figs, etc.