In a large saucepan bring the 4 cups of water to a boil (you want a large enough pan so that when you add the oats it doesn't boil over)

Stir in oats and salt and continue to boil for 1 minute. Watch closely here as you may have to stir and adjust the heat so it doesn't boil over.

Remove from heat and place a tight fitting lid on the pan and allow to sit overnight or 8-12 hours.

In the morning, just stir and reheat. Add sweeteners or desired toppings!

Refrigerate any leftovers.