YOU SAID:

I asked my mom how to eat a pizza

INTO JAPANESE

私の母にピザの食べ方を頼んだ。

BACK INTO ENGLISH

My mother asked him how to eat the pizza.

INTO JAPANESE

私の母は彼にピザを食べる方法を尋ねた。

BACK INTO ENGLISH

My mother asked how he eats pizza.

INTO JAPANESE

私の母は、彼がピザを食べる方法を尋ねた。

BACK INTO ENGLISH

My mother asked how he eats pizza.