Commentary for Berakhot 69:1
מתני׳ <big><strong>כיצד</strong></big> מברכין על הפירות על פירות האילן הוא אומר בורא פרי העץ חוץ מן היין שעל היין הוא אומר בורא פרי הגפן ועל פירות הארץ הוא אומר בורא פרי האדמה חוץ מן הפת שעל הפת הוא אומר המוציא לחם מן הארץ ועל הירקות הוא אומר בורא פרי האדמה רבי יהודה אומר בורא מיני דשאים:
MISHNAH What benediction do we say over fruit ? Over the fruit of trees, one says, "[Blessed art Thou, O Lord our God, King of the universe] Who Createst the fruit of the tree," except over wine ; for over wine ons says, "...Who createst the fruit of the vine." Over the fruits of the earth one says : "... Who createst the fruit of the ground," except over bread; for over bread one says, "...Who bringest forth bread from the earth." Over vegetables one says, "... Who createst the fruit of the ground" ; but R. Judah declares : "... Who createst divers kinds of herbs."
Tosafot on Berakhot
Alternatively, we can answer, that the question, how, refers to the Mishna in Mee Shemaiso (20b) that teaches a baal keree recites a b’rochoh after a meal, and does not recite a b’rochoh before a meal. The Mishna is clearly referring to an obligation to recite a b’rochoh. It is only saying that one does not recite that b’rochoh when a baal keree. And so too, here it is feasible to recite a b’rochoh on each and every thing; therefore the Gemara asks here, how one recites a b’rochoh that he is required to recite as we have seen in Mee Shemaiso.