Bologna sandwich or the baloney sandwich is the most common sandwich in America. Bologna sandwich is made from bologna sausages which are made from leftover, turkey, beef, pork or chicken. The bologna sausages are pre-sliced for the purpose of making the sandwich. The meat is pre-cooked usually by frying. Lettuce, tomatoes and onions accompany the meat and mustard or mayonnaise is often added as condiments. Bologna sandwiches have a high fat and sodium content which increases the risk of heart and blood pressure problems if consumed too often.