Michelle O'Neill said the burgers had been supplied to Eurest outlets that supply Greenmount and Loughry campuses.
BBC: Northern Ireland
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Greenmount College near Antrim can provide specialist advice on crops and livestock as well areas like organic production.
BBC: Farmers diversify to stay afloat
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In her reply, the agriculture minister said burgers containing horsemeat had been supplied to the Eurest outlets at Greenmount and Loughry campuses of CAFRE (College for Agriculture, Food and Rural Enterprise).