Ekmekinin hepsi yedi! He has eaten all the bread! Thank you

Soften "k" to "ğ" then it is ok...

Armegon thank you. Ekmeğinin hepsi yedi .

Sorry, another correction I missed "Ekmeğinin hepsini yedi" 

He has eaten all his bread---> Ekmeğinin hepsini yedi.

He has eaten all the bread---> Ekemeğin hepsini yedi.

If a two or more syllable word ending in k followed by a suffix beginning in a vowel, k turns into ğ : ekmek - ekmeği,  kepenek - kepeneğe,etc. 

As far as I remember one syllable word ending in k  don´t follow the rule (except çok - çoğu)

tok - tokun, tek - teki, fark - farka, etc.