Kerri Letmon rose from the bench to fire Peamount United past Dinamo-BGU FK after extra-time, as the Dubliners marched into the Champions League qualifiers round 1 final.
The Peas are in the 'Champions Path' and must come through a semi-final and final in the Croatia-hosted four-team tournament to make round 2.
They faced a tall order against Dinamo-BGU, a side stacked with Belarus internationals, but James O'Callaghan's charges produced a terrific display in 26-degree heat.
The reigning SSE Airtricity Women's Premier Division champions got off to the perfect start at Stadion Gradski vrt, Ellen Dolan drilling home a good low finish in the sixth minute.
Dinamo-BGU hit back in the 33rd minute when Anna Sas levelled from a corner.
It was a nip and tuck thereafter with both sides cancelling each other out, and the game drifted into extra-time.
A spark was required to crack the contest open, and in the 96th minute, substitute Letmon provided it, coolly sliding a good finish past Ekaterina Kovalchuk.
Peamount held their nerve to close out the game and will play host team Osijek on Saturday in the final.
Thirteen years ago the Peas made history when they became the first ever Irish side to emerge from the Women's Champions League qualifying phase, beating Parnu of Estonia and Slovenians Krka to make the round of 32 knockout phase.
A repeat of that would be an immense achievement, and O'Callaghan's players will now focus on recharging the batteries for one more push to progress to round 2.
Dinamo: Ekaterina Kovalchuk; Anastasiya Maher, Alina Charlionak (Hanna Siniauskaya 71), Anna Sas, Yana Artishevskaya (Darya Harshkova 46), Yulia Slesarchik, Anastasiya Shuppo (Olga Kapysha 100), Alina Kharashchak (Anastasiya Kavaliola 46), Darya Maniukova, Zarina Kapustina (Renata Kalinouskaya 46), Anna Pilipenko (capt)
Peamount United: Niamh Reid-Burke; Lauryn O'Callaghan (Aoife Brophy 99), Jetta Berrill, Chloe Moloney, Lucy McCartan, Niamh Farrelly (Ciara Maher 88), Jess Fitzgerald (Ciara McManus 100), Ellen Dolan, Karen Duggan, Dearbhaile Beirne (Michelle Doonan 74), Rebecca Watkins (Kerri Letmon 53)
Referee: Tjaaa Misja (Slovenia)
