Μόλις ζεσταθεί η τοστιέρα, βάζω μέσα το τοστ.

Yes. Μόλις has two very common meanings:

• as soon as
• just / just now

In this sentence, it means as soon as because it introduces a time clause:

• Μόλις ζεσταθεί η τοστιέρα... = As soon as the toaster heats up...

So the meaning depends on context. For example:

• Μόλις έφαγα. = I just ate.
• Μόλις έρθει, φεύγουμε. = As soon as he comes, we leave.

Ζεσταθεί is the form Greek normally uses after μόλις when talking about a future event that must happen before something else.

This is an aorist subjunctive form. In English grammar terms, you can think of it as the form used for once/when/as soon as something happens.

So:

• μόλις ζεσταθεί η τοστιέρα = as soon as the toaster gets heated / heats up

By contrast:

• ζεσταίνει = it heats / it is heating (active)
• ζεσταίνεται = it is heating up / gets warm (present middle-passive)
• ζεσταθεί = it heat up / get heated in this kind of dependent clause

After words like όταν, μόλις, άμα, Greek often uses this kind of form for future-related subordinate clauses.

Formally, it comes from the passive/middle side of the verb system, yes. But in meaning, it often works very naturally in English as get warm, heat up, or be heated depending on context.

So here:

• η τοστιέρα ζεσταθεί does not have to sound strongly passive in translation.
• A natural English equivalent is simply the toaster heats up or the toaster gets hot.

Greek often uses these middle/passive forms where English prefers an active-looking expression.

Normally, the subjunctive in Greek is introduced by να. But after certain words and conjunctions, especially time expressions like μόλις, the subjunctive form can appear without να.

So this is normal:

• Μόλις ζεσταθεί η τοστιέρα...

You do not need to say:

• Μόλις να ζεσταθεί... ✘

That would be wrong here.

Greek often uses the present tense for:

• habitual actions
• instructions
• vivid narration
• general procedures

So βάζω μέσα το τοστ here can mean something like:

• I put the toast in
• I then put the toast in
• you put the toast in in an instructional style
• I put the toast in once it heats up as a routine action

If you wanted a more explicit one-time future meaning, you could say:

• Μόλις ζεσταθεί η τοστιέρα, θα βάλω μέσα το τοστ.

That would mean As soon as the toaster heats up, I’ll put the toast in.

So the present here is not strange; it often sounds like describing a regular process.

Both are possible. Greek word order is flexible.

• βάζω μέσα το τοστ
• βάζω το τοστ μέσα

Both can mean I put the toast in.

The version in your sentence puts μέσα earlier, which slightly emphasizes the idea of inside/in before naming what is being put in.

Greek often moves words around for rhythm, focus, or style more freely than English does.

Μέσα means inside or in.

In this sentence, it works adverbially:

• βάζω μέσα το τοστ = I put the toast in / inside

Greek often uses μέσα without needing an extra preposition in everyday speech when the destination is clear from context.

You could also hear fuller versions like:

• βάζω το τοστ μέσα στην τοστιέρα = I put the toast inside the toaster

But since the toaster was already mentioned, just μέσα is enough.

Greek uses the definite article much more often than English.

So:

• η τοστιέρα = the toaster
• το τοστ = the toast / the sandwich toast

Even when English might omit an article in a general instruction, Greek often keeps it.

For example, Greek commonly says:

• Άνοιξε την πόρτα. = Open the door.
• Βάζω το ψωμί στον φούρνο. = I put the bread in the oven.

So το τοστ is very normal Greek.

• η τοστιέρα is feminine
• το τοστ is neuter

That is why the articles are:

• η for τοστιέρα
• το for τοστ

This is something you usually just have to learn with each noun. Loanwords in Greek can end up with different genders depending on usage and form.

Usually, yes. Τοστ is commonly treated as an indeclinable loanword in everyday Greek, especially in casual speech.

So you will often see the same noun form with different functions, while the article shows the case:

• το τοστ
• του τοστ
• στο τοστ

The article changes, but τοστ itself often stays the same.

Yes, but the meaning changes slightly.

• Μόλις ζεσταθεί η τοστιέρα, βάζω μέσα το τοστ.
  = As soon as the toaster heats up, I put the toast in.

• Όταν ζεσταθεί η τοστιέρα, βάζω μέσα το τοστ.
  = When the toaster heats up, I put the toast in.

Μόλις stresses immediacy: the second action happens right after the first.
Όταν is more neutral: when.

So μόλις is the better choice if you want as soon as.

The comma separates the time clause from the main clause:

• Μόλις ζεσταθεί η τοστιέρα, = subordinate clause
• βάζω μέσα το τοστ. = main clause

This is very normal punctuation in Greek, just as in English with introductory clauses:

• As soon as the toaster heats up, I put the toast in.

In Greek, τοστ very often means a toasted sandwich rather than just a slice of browned bread.

So depending on context, βάζω μέσα το τοστ may mean:

• I put the toast in
• I put the sandwich in the toaster / sandwich press

The exact meaning depends on the situation and on what kind of appliance τοστιέρα refers to in context. In everyday Greek, τοστιέρα is often a sandwich toaster / toast maker rather than only a vertical pop-up toaster.

It can be understood either way, depending on context.

With βάζω in the present tense, it could mean:

• a routine: Whenever the toaster heats up, I put the toast in
• an instructional/process style: Once the toaster heats up, put the toast in
• a vivid description of what someone does

If you wanted to make it clearly instructional, Greek might also use an imperative:

• Μόλις ζεσταθεί η τοστιέρα, βάλε μέσα το τοστ.
  = As soon as the toaster heats up, put the toast in.

So the original sentence is a little broader and more neutral.