Berakhot 37B

ולא מין דגן הוא, או מין דגן ולא עשאו פת ⁠— רבן גמליאל אומר שלש ברכות, וחכמים אומרים ברכה אחת. כל שאינו לא משבעת המינין ולא מין דגן, כגון פת אורז ודוחן ⁠— רבן גמליאל אומר ברכה אחת מעין שלש, וחכמים אומרים ולא כלום.

and is not a species of grain, but one of the fruits, or which is a species of grain and has not been made into bread, there is a dispute. Rabban Gamliel says that one recites the 3 blessings of the Grace after Meals and the Rabbis say that one recites a single blessing. And over anything that is neither one of the 7 species nor a species of grain, such as rice bread or millet bread, Rabban Gamliel says that after eating, one recites one blessing abridged from the 3 blessings of Grace after Meals, and the Rabbis say that one need not recite any blessing, i.e., Grace after Meals or one blessing abridged from 3, but instead he recites: Who creates the many forms of life. If so, the Tosefta, which says that after rice one recites one blessing abridged from 3, is in accordance with R' Yehuda’s version of Rabban Gamliel’s opinion.

במאי אוקימתא ⁠— כרבן גמליאל? אימא סיפא דרישא, אם אין הפרוסות קיימות ⁠— בתחלה מברך עליה ״בורא מיני מזונות״, ולבסוף מברך עליה ברכה אחת מעין שלש. מני: אי רבן גמליאל, השתא אכותבות ואדייסא אמר רבן גמליאל שלש ברכות, אם אין הפרוסות קיימות מיבעיא?!

The Talmud challenges: How did you establish the Tosefta? In accordance with the opinion of Rabban Gamliel. Say the latter clause of the first section of this Tosefta, which states that even over wheat bread, when the slices are not intact, then at the start one recites: Who creates the various kinds of nourishment, and at the end one recites one blessing abridged from the 3 blessings of Grace after Meals. Whose opinion is reflected in that section of the Tosefta? If it is the opinion of Rabban Gamliel, now if over dates and pounded wheat, Rabban Gamliel said that one recites the 3 blessings of Grace after Meals, in a case where the slices of bread are not intact, is it necessary to say that one recites Grace after Meals?