Bread is a staple food prepared basically by cooking/baking a dough of flour and water. Most of the time additional ingredients are used as well. Doughs are usually baked. In some cuisines breads are steamed, fried or baked on an unoiled skillet.
Following are very common ingredients used: salt, fat, yeast, baking soda. Leavening agents are very important in bread making process. Bread may contain other ingredients: sugar, egg, spice, fruit (such as raisins), nuts (such as walnuts), seeds (such as poppy seeds or sunflower seeds) or vegetables (such as onion or garlic).
Dating back to the Neolithic era bread is one of the oldest prepared foods. The development of leavened bread can probably also be traced to prehistoric times.
More information will be available soon.