ARE CALLAH BREAD ITEMS KOSHER?

Answer: 

Callah, also known as "kallah bread", is technically not kosher, and the consumption of it is, hence, forbidden during Passover.  Nonetheless, a large number of Jews, consume Callah  year-round; especially on Shabbat.  Also, in my secular opinion, the consumption of flattened bread is technically healthier for one who maintains a kosher for health lifestyle.

Further, no traditional bread items are technically Kosher, and are forbidden on Passover; according to how one can interpret Jewish cultural traditions.

In summary, traditional bread commonly made to raise through the use of yeast, can be  considered to not be kosher.