A nursery in the South Wales Valleys and a nursing home in Gwent both bought the cottage pie from Castell Howell wholesalers.
The pie was made by Oak Farm Foods; five customers in total are believed to be affected.
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Aaron Ramsey has told his English team-mates at Arsenal to beware Wales overtaking them in the FIFA rankings.
Plenty of fine dry weather to come today and prolonged spells of sunshine. A cool easterly breeze will take the edge off the temperatures.
The three-day event in the Welsh capital is expected to attract more than 20,000 visitors.