Stovetop: Combine water (or milk) and salt in a small saucepan. Bring to a boil. Stir in oats and reduce heat to medium; cook for 1 minute. Remove from heat, cover and let stand for 2 to 3 minutes.
Microwave: Combine water (or milk), salt and oats in a 2-cup microwave-safe bowl. Microwave on High for 1 1/2 to 2 minutes. Stir before serving.
Serve with your favorite toppings, such as milk, sweetener, cinnamon, dried fruits and nuts.