Al final acabamos sirviendo la cena en una bandeja porque la cazuela seguía demasiado caliente.

It is past tense here: we ended up.

The form acabamos is tricky because for -ar verbs, the nosotros form of the present and the preterite looks the same in writing:

• acabamos = we finish / we end
• acabamos = we finished / we ended up

You tell which one it is from context. In this sentence, the rest of the wording points to the past, especially seguía (was still / kept being), so the natural reading is:

• Al final acabamos sirviendo... = In the end, we ended up serving...

Acabar + gerundio often means to end up doing something.

So:

• acabamos sirviendo la cena = we ended up serving dinner

This structure suggests that this was the result after some situation, hesitation, or change of plan. It is more expressive than simply saying:

• servimos la cena = we served dinner

The version with acabamos sirviendo gives the idea of that’s what we eventually did in the end.

Because this construction is:

• acabar + gerundio

So Spanish says:

• acabar sirviendo
• acabar diciendo
• acabar yendo

not acabar servir.

This is important because there is another very common structure:

• acabar de + infinitive = to have just done something

For example:

• Acabamos de servir la cena = We have just served dinner

But your sentence is different:

• acabamos sirviendo la cena = we ended up serving dinner

So the gerund is necessary here.

Here al final means in the end or eventually.

It often sounds very natural in everyday Spanish when talking about the final result of a situation.

• Al final acabamos sirviendo la cena... = In the end, we ended up serving dinner...

Finalmente can also mean finally / in the end, but it can sound a bit more formal or literary depending on context.

In everyday speech, al final is often the more natural choice for this kind of sentence.

Because Spanish often uses the definite article more than English does.

Here la cena refers to a specific dinner: the dinner / the evening meal we were serving.

So:

• servir la cena = very natural
• servir cena = possible in some contexts, but less natural here

English often drops the article in expressions like serve dinner, but Spanish frequently keeps it.

Cazuela usually refers to a casserole dish, earthenware dish, or sometimes the cooking vessel/pan itself, depending on context.

In this sentence, it most likely means the container the food was in while cooking or staying hot.

So the idea is that they served the food on a tray because the casserole dish / pot was still too hot.

A learner should note that cazuela is:

• feminine
• singular

That is why the sentence says:

• la cazuela
• seguía
• caliente

Both can work, but seguía adds the idea of still being or continuing to be hot.

• la cazuela seguía demasiado caliente = the dish was still too hot
• la cazuela estaba demasiado caliente = the dish was too hot

So seguía emphasizes persistence: it remained hot, even at that point.

This is very natural when something has not changed as expected.

Because it describes an ongoing background state in the past.

In the sentence, the serving happened as a completed event:

• acabamos sirviendo = we ended up serving

But the reason is given as a continuing condition at that moment:

• la cazuela seguía demasiado caliente = the dish was still too hot

That is exactly the kind of situation where Spanish often uses the imperfect: background, ongoing, descriptive past information.

The subject is la cazuela.

So the structure is:

• porque la cazuela seguía demasiado caliente

Literally:

• because the casserole dish was still too hot

This is useful to notice because the sentence starts with acabamos (we ended up), but after porque the subject changes from we to the dish.

Because words like demasiado, muy, and bastante normally go before the adjective.

So:

• demasiado caliente = too hot
• muy caliente = very hot
• bastante caliente = quite hot

Putting demasiado after the adjective would sound unnatural here.

It means on a tray or in a serving tray/platter, depending on context.

• bandeja = tray
• en una bandeja = on/in a tray

Spanish often uses en with containers, dishes, trays, and serving vessels where English might use on or in depending on the object.

So the phrase simply tells you how they served the dinner: not in the hot casserole dish, but transferred to a tray.

Because porque is the conjunction meaning because.

• porque = because
• por qué = why

So in this sentence:

• porque la cazuela seguía demasiado caliente = because the dish was still too hot

A common learner mistake is mixing these up, but here it must be the one-word form porque.