Yes, mushrooms are a fungus, but, when eaten, taste great and have many beneficial properties.

Mushrooms are a good source of  Vitamins B1, B2, and B3 (which are important for a healthy nervous system and the metabolism of carbohydrates, fats, and proteins) and germanium, which increases oxygen efficiency of the body, counteracts the effects of pollutants, and enhances the immune system.  They also decrease the fat level in the blood and help get rid of excess mucus in the respiratory system.  Because mushrooms are low in calories, they are also helpful for weight loss.

There are many different types of mushrooms, white button mushrooms being the most common.  Some other types are cremini, oyster, shitake, and portobello.  Each type of mushroom has its own taste but all are easy to prepare.  They may be eaten raw, sliced in a salad, sauteed, stir-fried, put in soups, lasagnas, sauces, gravies, and even barbequed on a stake, or straight onto the grill, as with portobello mushrooms (I highly recommend this last one).