If you're ever at a loss for a particular recipe in a food service situation, look up the U.S. Department of Agriculture's website on the Internet. They offer a huge variety of standardized recipes for schools, nursing homes, and other food service environments.
The food service industry is prone to wasting food, but you can do plenty (individually or as an organization) to cut back on wastage. For example, you can donate unused food to local food banks, buy beverages and meats in bulk, and recycle everything from used cooking oils to aluminum.