During the Pesukeh De'zimra section of the morning prayer service – from Baruch She'amar through Yishtabah – it is forbidden, as a general rule, to make any sort of interruption. What should a person do if he realizes during Pesukeh De'zimra that he had not recited Birkot Ha'Torah that morning? As one is not permitted to read verses from Tanach before reciting Birkot Ha'Torah, should this person be permitted to interrupt Pesukeh De'zimra for the sake of reciting Birkot Ha'Torah?
The Mishna Berura rules that indeed, the person in such a case should interrupt Pesukeh De'zimra, recite all three blessings that comprise Birkot Ha'Torah, followed by the verses of Birkat Kohanim which are customarily read after Birkot Ha'Torah, and then resume Pesukeh De'zimra.
Hacham Ovadia Yosef, however, disagreed. He ruled that the person should recite only the final blessing of Birkot Ha'Torah – "Baruch…Asher Bahar Banu…" – and then resume his recitation of Pesukeh De'zimra. Upon completing Pesukeh De'zimra – after reciting Yishtabah – he should recite the first two Berachot of Birkot Ha'Torah ("Baruch Ata…Al Dibreh Torah" and "Ve'ha'areb Na"), followed by the verses of Birkat Kohanim which are customarily recited after Birkot Ha'Torah. He should then continue with the Beracha of "Yoser Or."