Carême was set a test by Talleyrand: he had to create a whole year’s worth of menus, without repeating them, and use only food that was in season. Carême passed the test and finished his training in Talleyrand's kitchens. When Napoléon was defeated Carême went to London for a time and served as "chef de cuisine" to the Prince Regent, later George IV. He returned to Europe to work for Czar Alexander I in St. Petersburg, before returning to Paris, where he was chef to banker James Mayer Rothschild.