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.

The verb stem is haşla-, which ends in a vowel. When the converb suffix is added, Turkish inserts a buffer y:

• haşla-
  • -ıp → haşlayıp

This happens often in Turkish when a suffix beginning with a vowel attaches to a word that already ends in a vowel.

Yes. It normally implies a sequence:

1. we boil the cauliflower
2. we eat it with yogurt

So it is not just two unrelated actions. The boiling happens first, and then the eating.

Yes. Yoğurtla is the shorter, very common form of yoğurt ile.

Both mean with yogurt.

• yoğurt ile = more explicit / slightly more formal
• yoğurtla = more natural in everyday speech

The suffix -la / -le is basically the attached version of ile.

Not in exactly the same way.

• yoğurtla means with yogurt and modifies the verb: we eat it with yogurt
• yoğurtlu is adjectival and means having yogurt / yogurt-covered / with yogurt as a characteristic

So:

• Karnabaharı yoğurtla yiyoruz = We eat the cauliflower with yogurt.
• Yoğurtlu karnabahar yiyoruz = We are eating cauliflower that has yogurt on it / yogurt cauliflower.

Both can be natural, but they structure the idea differently.

Yiyoruz comes from yemek (to eat), but this verb changes a little when suffixes are added.

It breaks down like this:

• ye- / yi- = eat
• -iyor = present continuous
• -uz = we

So:

• yi-yor-uz → yiyoruz

This is a common pattern with yemek. It is a slightly irregular-looking verb, so learners often just memorize forms like:

• yiyorum = I am eating
• yiyorsun = you are eating
• yiyoruz = we are eating

Grammatically, -iyor is the present continuous marker, so the basic meaning is we are eating.

But in real Turkish, this form can sometimes also sound natural for a repeated or current habit, depending on context. So this sentence could mean:

• We are eating the cauliflower with yogurt
  or
• We eat cauliflower with yogurt

Without more context, the most direct reading is we are eating.

Because Turkish often leaves out subject pronouns when the verb already shows the person.

Here, -uz in yiyoruz already means we, so biz is unnecessary.

• Biz karnabaharı haşlayıp yoğurtla yiyoruz = possible, but more explicit
• Karnabaharı haşlayıp yoğurtla yiyoruz = perfectly normal

Turkish does this very often with all persons.

Because Turkish normally prefers subject–object–verb word order, and the main verb often comes last.

In this sentence:

• Karnabaharı = object
• haşlayıp = linked action
• yoğurtla = with yogurt
• yiyoruz = main verb

So the sentence follows a very typical Turkish pattern: everything builds up toward the final verb.

English usually puts the verb earlier, but Turkish often saves the main verb for the end.