Oat bran is the outer part of the grain, containing a high amount of the fiber in the grain. Oats, along with having a high amount of fiber, contain thiamin, riboflavin and vitamin E. One 3/4-cup serving of cooked oat bran has 59 calories, 3 grams of protein, 3 grams of fiber and 3 grams of protein. Oat bran, like other whole grains, lower cholesterol and decrease your risk of diabetes, heart disease and some cancers, making oat bran cereal a healthy breakfast. Since some oat bran cereals may contain other grains in their mix, cooking times vary depending on the hardiness of the grain. It's most important to provide the cereal with sufficient water and cook the grains until they are tender.

Pour 1/3 cup of cereal and 3/4 cup of water into a medium microwave-safe bowl to make one serving. For a larger quantity, double the amounts of cereal and water used.

Stir the water and cereal together.

Microwave the mixture on high for 2 to 3 minutes, or until all the water is soaked into the grains and the cereal is tender.

Allow the cereal to stand for 2 minutes.