New Covent Garden Market will bring together producers, wholesalers and distributors from London for a trade fair and conference.
Chefs and professional buyers from the private and public sectors will try out the best produce from London and the surrounding areas.
The open day is part of a three-year project to ensure more local food ends up on the capital's plates via wholesalers, caterers and distributors based at the market.
Producers from the South East and East Anglia will showcase local seasonal ingredients for wholesalers, distributors and chefs to sample and discuss.
The conference, Share to Supply, is run by non-profit promoter English Farming & Food Partnerships.