Every caterer has a business concept that's reflected in his menus, his pricing, and the way he does business. Some caterers have more interesting concepts than others. Many caterers stick to the basics and serve customers with typical offerings like salmon, chicken, and beef entrées. Other caterers offer their clients a unique take on ethnic food, outdoor picnics, or kosher eating. Put your market research to work to imagine and test a concept that will work for you.