Food engineering was not my thing back then.
The motivational letter should only represent a growing interest in the field. By indicating a lack of early interest, the reviewer just may decide that you are not a good candidate as your interests may change later on.
match my interests.
Reflect on these matched interests as an option for your motivation.
I had the opportunity to channel this interest
Open with this statement instead. Remember to build up an early motivation for food engineering first.
A multicultural environment in Turkey
You can also get this social exposure in your home country. Do not use this as a reason. It makes you sound like an eager tourist instead of a student.
Food engineering itself is a relatively new discipline. It started as a response to the social changes in developed countries.
Do not lecture the reviewer.
My home country
but food engineering itself
Merge the 2 paragraphs to clearly represent a local problem you wish to solve through your studies.