As a result of positive sales and traffic and an optimistic outlook, the National Restaurant Association's RPI remained in expansion territory.

May also represented the third straight month that the RPI surpassed the 100 level.

Mintel has identified four trends set to impact the restaurant industry in 2013.

Bolstered by stronger same-store sales and customer traffic levels, the National Restaurant Association's Restaurant Performance Index (RPI) stood above 100 for the eighth consecutive month in June.

The deli continues to modernize as it remains a destination for convenient meals.

Taste of Smithfield will feature Smithfield pork products, including Smithfield Innovation Kitchen Specials and Windsor Castle Box Lunches.

The RPI - a monthly composite index that tracks the health of and outlook for the U.S. restaurant industry - stood at 101.4 in May, down 0.2 percent from April's level of 101.6.