CulturGrams is an online database that provides you with cultural and statitical information for all countries. It includes information on diet, history and geography.
The World Book online is a great place to begin your research. For this assignment, use the French language version, L'Encyclopédie Découverte.
You will find lots of international recipes on the web. Food In Every Country and The Cooking Channel are two websites with lots of recipes and information about the food traditions of various countries around the world.