Celebrity chef, Jamie Oliver, was in charge of cooking the meal in Downing Street, but was assisted by eight young people. Seven have graduated from the foundation's apprenticeship scheme, and one is still training.
Before cooking the meal Oliver said: "The guests at Downing Street will be in for a real treat."
Oliver is a trustee of the Fifteen Foundation, which runs an apprenticeship scheme aimed at disadvantaged young people who want the chance to become a chef.
Many graduates from the programme have gone on to work at top London restaurants.
What the world leaders ate:
Menu for the G20 dinner at Downing Street, 1st April 2009
Baked Scottish salmon with seashore vegetables, broad beans, herb garden salad, mayonnaise and wild garlic-scented Irish soda bread.
Vegetarian option: Childwickbury goat's cheese with roast shallots, seashore vegetables, herb green salad and wild garlic-scented Irish soda bread (no mayo).
Slow-roasted shoulder of Welsh lamb, very first of the season Jersey royals, first of the season asparagus and wild St George mushrooms. Mint sauce and gravy.
Vegetarian option: Lovage and potato dumplings with first of the season asparagus and wild St George mushrooms.
Hot Bakewell tart with homemade custard.
