Reduce heat to low and simmer uncovered for 15 to 20 minutes. Stir a few times while cooking.
Turn off heat and let stand for 2 minutes before serving.
Refrigerate leftovers within 2 hours.
Notes
Topping ideas: fresh, frozen or dried fruit; milk or yogurt; chopped nuts or seeds; cinnamon or other spices. Savory toppings include chopped vegetables and grated cheese.
For even creamier steel cut oats, stir in more water and cook a few minutes longer.
Cooked oats can be stored in the refrigerator for 3 to 4 days or in the freezer for up to 3 months.