The £21m premises is part of a phased four-year £37m investment project, supported by Invest Northern Ireland and the European Regional Development Fund.
Speaking at the opening, Foster said: “Moy Park Limited is now one of the UK’s largest food processing companies, having acquired O’Kane Poultry Limited earlier this year.
“This new state-of-the-art manufacturing facility in Ballymena is an important step in helping the company to build upon its position by increasing its production capability and developing new added-value products.
“Today marks an opportunity to further develop innovation and employment within our highly successful food and drink industry. Moy Park has made a significant commitment to growth through this overall £37m investment, which aims to achieve external sales of £154m by 2013.
“It is this type of commitment which will help us on the path to economic recovery.”
Nigel Dunlop, Moy Park MD, added: “This new facility forms a key part of Moy Park’s wider strategy, which aims to grow and secure our market position. The highly advanced facility will allow us to meet the needs of new and existing customers while investigating new product concepts and increasing our production of consumer-led poultry products for the UK and European markets.”