Kad sam gladan, ponekad mi se jede burek sa sirom, ali danas mi se više pije kamilica.

Because gladan is an adjective, and in Croatian adjectives change to match the speaker’s gender and number.

Here it is:

• gladan = masculine singular
• gladna = feminine singular
• gladno = neuter singular
• gladni / gladne / gladna = plural, depending on gender

So:

• Kad sam gladan... = if the speaker is male
• Kad sam gladna... = if the speaker is female

Croatian often uses adjectives after sam (I am) in this way:

• Umoran sam. = I am tired.
• Sretan sam. = I am happy.

Kad usually means when, but in sentences like this it can also have a general meaning close to when(ever).

So Kad sam gladan, ponekad mi se jede... means something like:

• When I’m hungry, I sometimes feel like eating...
• Whenever I’m hungry...

It is not really a conditional if in the strict English sense, even though English might sometimes translate it that way naturally.

Ponekad means sometimes.

In this sentence:

• Kad sam gladan, ponekad mi se jede...
  = When I’m hungry, I sometimes feel like eating...

Its position is fairly flexible, but Croatian word order often shifts for emphasis or rhythm. You could also hear:

• Kad sam gladan, mi se ponekad jede...
• Ponekad mi se jede burek sa sirom...

The version in your sentence sounds natural and neutral.

Mi se jede is a very common Croatian way to say I feel like eating or I’m in the mood to eat.

Literally, it is something like:

• mi = to me
• se jede = eating is happening / it is eaten

But you should learn it as a whole pattern:

• jede mi se / mi se jede = I feel like eating
• pije mi se / mi se pije = I feel like drinking
• spava mi se = I feel sleepy / I feel like sleeping

This structure often expresses a spontaneous physical desire, craving, or urge, not a deliberate decision.

Compare:

• Želim jesti burek. = I want to eat burek.
  More direct, neutral want.
• Jede mi se burek. = I feel like eating burek.
  More like a craving.

They are both part of the idiomatic Croatian construction.

• mi is the dative form of ja and means to me
• se is the reflexive particle used in many Croatian verbs and expressions

So in:

• mi se jede burek
• mi se pije kamilica

the combination mi se + verb creates the meaning I feel like ...

You usually do not translate each piece separately. It is better to think of:

• mi se jede = I feel like eating
• mi se pije = I feel like drinking

This pattern is extremely common in everyday speech.

That is because this is not a normal present-tense sentence like I eat or I drink.

This is the impersonal reflexive construction:

• jede mi se
• pije mi se

In this pattern, Croatian uses the 3rd person singular form of the verb:

• jede from jesti = to eat
• pije from piti = to drink

So even though the meaning is about me, the verb stays in that impersonal form.

You can think of it as:

• It feels-eatable to me
• It feels-drinkable to me

Not natural English, of course, but it helps explain the grammar.

Because burek is the thing being wanted, so it stays in the accusative, and for an inanimate masculine noun like burek, the accusative looks the same as the nominative:

• burek = nominative
• burek = accusative

But sa (with) requires the instrumental case, so:

• sir = cheese
• sa sirom = with cheese

So:

• burek sa sirom = burek with cheese

This is a very useful pattern:

• kava sa šećerom = coffee with sugar
• tjestenina sa sirom = pasta with cheese
• čaj s limunom = tea with lemon

Both s and sa mean with.

Croatian uses sa instead of s when pronunciation is easier that way, especially before certain consonant clusters or sounds. In many contexts, sa sirom sounds smoother than s sirom.

So:

• sa sirom = perfectly natural
• s sirom = possible in theory, but much less natural here

You will often see:

• sa mnom = with me
• sa sestrom = with (my) sister
• sa sirom = with cheese

Yes, više literally means more, but in this sentence it works more like rather or more than the other option.

So:

• ali danas mi se više pije kamilica means:
• but today I’d rather drink chamomile
• but today I feel more like drinking chamomile

It contrasts with the earlier idea of wanting to eat burek.

So the sense is:

• sometimes I crave burek,
• but today I’m more in the mood for chamomile.

Literally, kamilica is chamomile, the plant/herb. But in everyday Croatian, especially with piti (to drink), it very often means chamomile tea.

So:

• Pijem kamilicu. = I’m drinking chamomile tea.
• Skuhao sam kamilicu. = I made chamomile tea.

This is similar to how English sometimes says I’m having chamomile instead of I’m having chamomile tea.

Yes, Croatian word order is flexible, but short unstressed words like mi, se, sam often behave as clitics and tend to appear near the beginning of a clause, usually in the second position.

That is why you get:

• Kad sam gladan...
• ponekad mi se jede...
• danas mi se više pije...

You may also hear:

• Jede mi se burek.
• Više mi se danas pije kamilica.

These are possible, but they change emphasis slightly.

For learners, the safest natural patterns are:

• Mi se jede...
• Mi se pije...
• Danas mi se...
• Ponekad mi se...

Yes, but the meaning changes.

• Želim burek sa sirom. = I want a cheese burek.
  Neutral, direct, sometimes more formal.
• Hoću burek sa sirom. = I want a cheese burek.
  Stronger, more direct, sometimes sounding demanding depending on context.
• Jede mi se burek sa sirom. = I feel like eating cheese burek.
  More natural for a craving or appetite.

So mi se jede / pije is especially good when talking about mood, appetite, or a spontaneous urge.

Yes, it is completely normal in everyday Croatian. It simply means burek with cheese.

One cultural note: in different parts of the former Yugoslavia, people sometimes have strong opinions about whether burek should mean only meat-filled pastry or can also include cheese, spinach, etc. But in much of Croatia, saying burek sa sirom is common and normal.

So as a learner, you can safely understand it as:

• cheese burek
• burek with cheese

Croatian has no articles like English a/an/the.

So:

• burek can mean a burek or the burek, depending on context
• kamilica can mean chamomile or the chamomile tea

Context tells you which meaning is intended.

That is why Croatian learners of English often struggle with articles, and English speakers learning Croatian need to get used to simply leaving them out.