Όταν είμαι πολύ νηστικός, ακόμη και μια απλή σφολιάτα μου φαίνεται υπέροχη.

Όταν means when and introduces a time clause.

In this sentence, Όταν είμαι πολύ νηστικός means When I am very hungry. It sets the situation for the main clause:

• Όταν είμαι πολύ νηστικός = when I’m very hungry
• ακόμη και μια απλή σφολιάτα μου φαίνεται υπέροχη = even a simple pastry seems wonderful to me

This use of όταν + present often expresses something habitual or generally true, not just one specific occasion.

Greek commonly expresses hunger in two main ways:

• είμαι νηστικός = I am hungry
• πεινάω = I’m hungry / I’m feeling hunger

So είμαι πολύ νηστικός is perfectly natural and means I’m very hungry.

There is a slight nuance:

• πεινάω πολύ focuses more on the feeling of hunger
• είμαι πολύ νηστικός describes your state or condition

Both are common.

Νηστικός is an adjective, and it must agree with the speaker.

Here it is νηστικός because the speaker is grammatically masculine singular.

Forms:

• masculine: νηστικός
• feminine: νηστική
• neuter: νηστικό

So:

• a man would say είμαι πολύ νηστικός
• a woman would say είμαι πολύ νηστική

Ακόμη και means even.

It adds emphasis: not just something delicious, but even something plain or ordinary would seem great.

So:

• ακόμη και μια απλή σφολιάτα = even a simple pastry

You may also see ακόμα και in Modern Greek. It is just a spelling variant; both are standard.

Because σφολιάτα is a feminine noun, the article and adjective must agree with it.

So we get:

• μια = a/an for feminine nouns
• απλή = simple, feminine singular
• σφολιάτα = feminine singular noun

Agreement pattern:

• μια απλή σφολιάτα
• article + adjective + noun all match in gender, number, and case

Σφολιάτα can refer to puff pastry as a dough, but in everyday Greek it very often refers to a pastry made from puff pastry.

Depending on context, it may mean something like:

• a savory puff pastry snack
• a cheese pie / ham-and-cheese pastry / similar bakery item
• puff pastry more generally

So in this sentence it gives the idea of a fairly ordinary bakery snack, which fits the contrast with υπέροχη.

Yes, Greek adjectives can often appear either before or after the noun, but the position can affect style or emphasis.

Here:

• μια απλή σφολιάτα = a simple pastry

This is the most natural and neutral order.

You can also find adjective-after-noun patterns in Greek, but adjective-before-noun is very common, especially for everyday descriptive adjectives like απλός.

Μου means to me.

The verb φαίνομαι / φαίνεται often means seem / appear.
So:

• μου φαίνεται υπέροχη = it seems wonderful to me

Literally:

• μου = to me
• φαίνεται = seems
• υπέροχη = wonderful

Greek very often uses these short object pronouns before the verb:

• μου = to me
• σου = to you
• του / της = to him / her
• μας = to us

Because the subject is μια απλή σφολιάτα, not I.

The verb agrees with σφολιάτα, which is third person singular:

• η σφολιάτα φαίνεται = the pastry seems

Compare:

• φαίνομαι = I seem
• φαίνεσαι = you seem
• φαίνεται = he/she/it seems

So μου φαίνεται υπέροχη literally means it seems wonderful to me.

Because υπέροχη describes σφολιάτα, which is feminine singular.

Adjectives agree with the noun they describe:

• masculine: υπέροχος
• feminine: υπέροχη
• neuter: υπέροχο

Since σφολιάτα is feminine:

• μια απλή σφολιάτα μου φαίνεται υπέροχη

Not exactly, but they are close in meaning.

Μου φαίνεται υπέροχη is more literally:

• it seems wonderful to me

In natural English, depending on context, this can overlap with:

• I find it wonderful
• it looks wonderful to me
• it seems great to me

The Greek expression emphasizes personal perception.

Because the sentence begins with a subordinate time clause:

• Όταν είμαι πολύ νηστικός, ...

The comma separates that introductory clause from the main clause. This is very common in Greek punctuation, just as in English:

• When I’m very hungry, even a simple pastry seems wonderful to me.

Yes, absolutely.

A very natural alternative is:

• Όταν πεινάω πολύ, ακόμη και μια απλή σφολιάτα μου φαίνεται υπέροχη.

This means almost the same thing.

Very roughly:

• όταν είμαι πολύ νηστικός = when I’m very hungry
• όταν πεινάω πολύ = when I’m very hungry / when I’m really hungry

The second version sounds a bit more verbal and immediate, but both are normal.

Yes, only the adjective referring to the speaker would normally change:

• male speaker: Όταν είμαι πολύ νηστικός...
• female speaker: Όταν είμαι πολύ νηστική...

The rest of the sentence stays the same, because σφολιάτα is still feminine singular:

• ...μια απλή σφολιάτα μου φαίνεται υπέροχη.

Greek word order is fairly flexible, but this version is very natural.

Standard order here:

• ακόμη και μια απλή σφολιάτα μου φαίνεται υπέροχη

You could move things around for emphasis, for example:

• Μου φαίνεται υπέροχη ακόμη και μια απλή σφολιάτα.

But that is more marked. For learners, the original order is the best one to remember.

It can do both, depending on context.

Here, μια απλή σφολιάτα means a simple pastry, so it works like the indefinite article a/an.

But μια can also mean one when the number is important.

Context tells you which meaning is intended. In this sentence, it clearly means a rather than emphasizing the number.