Αν ήμουν πιο πρόθυμος, θα μαγείρευα τώρα αντί να τρώω κρουασάν και σαλάμι.

It is a present unreal conditional: a situation that is imagined, not real.

The pattern here is:

• Αν + imperfect
• θα + imperfect

So:

• Αν ήμουν πιο πρόθυμος = If I were more willing
• θα μαγείρευα τώρα = I would be cooking now

Greek often uses past-looking forms for hypothetical present situations, just as English says If I were... rather than If I am... in this kind of sentence.

Because Greek uses the imperfect after αν for an unreal or contrary-to-fact present condition.

• Αν ήμουν πιο πρόθυμος... = If I were more willing...
  This suggests I am not more willing right now.
• Αν είμαι πιο πρόθυμος... would mean something more like If I am more willing..., which sounds like a real possibility, not a hypothetical contrary-to-fact idea.

So ήμουν is not past time here; it marks unreality.

Because in this type of conditional, Greek commonly uses θα + imperfect in the main clause.

• θα μαγείρευα = I would cook / I would be cooking

The verb μαγείρευα is the imperfective past form, but with θα it gives a conditional meaning. In this sentence, because of τώρα, it most naturally means:

• I would be cooking now

rather than a simple future like I will cook.

Because the past forms here do not indicate past time. They indicate a hypothetical or unreal situation.

So:

• ήμουν does not mean I was in a past-time sense here
• μαγείρευα does not mean I was cooking in a past-time sense here

Instead, the sentence means something unreal in the present, and τώρα makes that explicit:

• If I were more willing, I would be cooking now

πρόθυμος is an adjective meaning willing, eager, or inclined.

So πιο πρόθυμος means:

• more willing
• more inclined
• sometimes more motivated, depending on context

It is an adjective because it describes the person, not the action.

That is why Greek uses:

• ήμουν πιο πρόθυμος = I were more willing

not an adverb.

Yes. Both are possible.

• πιο πρόθυμος = analytic comparative
• προθυμότερος = synthetic comparative

In everyday Greek, πιο + adjective is often the more common and natural choice, so πιο πρόθυμος sounds very normal.

The adjective agrees with the speaker in gender, number, and case.

Here, πρόθυμος is:

• masculine
• singular
• nominative

So it fits a male speaker saying I.

If the speaker were female, you would normally say:

• Αν ήμουν πιο πρόθυμη, θα μαγείρευα τώρα...

If the subject were plural, the adjective would also change accordingly.

αντί να means instead of followed by a verb.

So:

• αντί να τρώω κρουασάν και σαλάμι = instead of eating croissants and salami / instead of eating a croissant and salami

It is a very common Greek structure:

• αντί να διαβάζεις, βλέπεις τηλεόραση = instead of studying, you watch TV

The να is required in this construction.

This is about aspect, which is very important in Greek.

• τρώω = imperfective aspect
  It focuses on an ongoing, repeated, or uncompleted action.
• φάω = perfective aspect
  It focuses on a single complete event.

In this sentence, να τρώω fits better because the idea is:

• instead of sitting here eating
• instead of being in the middle of eating

So the ongoing sense makes good sense.

If you used να φάω, it would sound more like instead of eating/finishing a specific thing once, which is less natural here.

Because standard Greek conditionals normally do not use θα in the αν clause.

So the normal pattern is:

• Αν ήμουν..., θα μαγείρευα...

not:

• Αν θα ήμουν...

The conditional or future-like meaning is usually marked in the main clause, not inside the αν clause.

It can correspond to either in English, depending on context.

Because μαγείρευα is imperfective, it often has an ongoing feel. With τώρα, the most natural English rendering is:

• I would be cooking now

But English may also say:

• I would cook now

if the context supports that.

So the Greek form is slightly broader than any one English translation.

Greek often allows bare nouns in food contexts, especially when the focus is on what kind of thing someone is eating rather than on the exact quantity.

So:

• τρώω κρουασάν και σαλάμι can sound like I’m eating croissant(s) and salami

This is especially natural with food items, and σαλάμι also behaves a lot like a mass noun.

That said, Greek could also make the quantity more explicit, for example:

• τρώω ένα κρουασάν και λίγο σαλάμι

So the article is not impossible; it is just not necessary here.

It could be understood either way from the form alone, because κρουασάν is an indeclinable loanword and often keeps the same shape.

Depending on context, it may mean:

• a croissant
• croissants

In this sentence, the exact number probably is not important; the point is simply that the speaker is eating snack food instead of cooking.

Yes. Greek word order is fairly flexible.

For example, you could also say:

• Αν ήμουν πιο πρόθυμος, τώρα θα μαγείρευα αντί να τρώω κρουασάν και σαλάμι.

This puts extra focus on τώρα.

The original order is very natural, though:

• Αν ήμουν πιο πρόθυμος, θα μαγείρευα τώρα...

It keeps τώρα close to μαγείρευα, which makes the timing clear.

Yes. Both exist.

• ήμουν is very common and standard
• ήμουνα is also common in spoken Greek and can sound a little more conversational

In this sentence, ήμουν is perfectly normal and neutral.