Historically, the short-lived Ottoman Sultanate ruled over large swathes of the Balkans and Western Anatolia in the last years of the 14th Century but Timur's invasion put an end to the nascent Ottoman Sultanate, but what if the Ottoman Sultanate survived Timur's invasions instead of falling into a civil war which it never recovered from? What PODs would be needed to keep the Ottoman Sultanate from falling appart after Timur's invasion of Anatolia? What would such a lasting Ottoman Sultanate look like?