The growers at Pick Your Own nursery in Chawston, Bedfordshire, won the bursary from the international non-profit group Slow Food.
It will help the couple exhibit their fresh chillies and chilli sauces at MasterChef Live, held at London Olympia on 13 November.
Joanna Plumb said: "This year has been fantastic, with so many more people coming to pick their own fresh produce."
Slow Food focuses on the importance of where food comes from, who makes it and how it is made, said manager Sue Braithwaite.
MasterChef Live will feature live cookery demonstrations. Presenters John Torode and Gregg Wallace will host cooking events.