Chabad.org — English translation + Rashi
Torah Temimah points to Menachos 74b.
E-Daf.com — Menachos 74b
HebrewBooks / Shas PDF
English: “Fine flour with oil shall it be made” — this teaches that it requires placing oil in the vessel.
Diyuk of ba-shemen te’aseh — oil is placed in the vessel before the flour is worked.
Oil is first put in the vessel, then the flour is worked with it. The Torah’s language “fine flour with oil shall it be made” is read as requiring the initial placement of oil in the vessel for the marcheshes minchah.