This is really good! I just have two suggestions - you might want to combine the second and third sentences - "I like it so much because it is really tasty and good." And the last sentence should be "It is ok." But that might have just been a typo, if so just ignore this comment.
1. My favourite meal is a Turkish Doner. Perfect! In USA English, favourite = favorite. You use the British spelling of the word.
2. I like it so much. Because it is really tasty and good. = I like it so much because it is really tasty and good. (Because is a conjunction, or a word that connects thoughts and sentences.)
Thank you for writing about this. It sounds very good. I had not heard the word "Doner" before. We grill meat on spits, especially in the summer, in the United States.
good !!~