Questions & Answers about Karnabaharı haşlayıp yoğurtla yiyoruz.
Because karnabaharı is the direct object of the sentence, and it is marked with the accusative suffix -(y)ı / -(y)i / -(y)u / -(y)ü.
Here, karnabaharı suggests a specific cauliflower / the cauliflower rather than cauliflower in a general sense.
- karnabahar yiyoruz = we eat cauliflower / we are eating cauliflower in general
- karnabaharı yiyoruz = we are eating the cauliflower / a specific cauliflower dish
So the -ı marks the object as definite or specific.
Haşlayıp comes from haşlamak and uses the converb suffix -ıp / -ip / -up / -üp.
This form links two actions done by the same subject. In this sentence, it means something like:
- boiling it and eating it
- after boiling it, we eat it
So haşlayıp ... yiyoruz connects the actions smoothly, instead of using two separate full clauses.