De catering serveert een borrelhap.

In this sentence, de catering usually refers to the catering service / the caterer as a business or provider, not just the food itself.

So Dutch catering can work a lot like English catering, but in a sentence like this it often means the company or service that provides the food.

Dutch nouns take either de or het as their definite article. Catering is a de-word, so you say de catering.

Unfortunately, there is not always a simple rule that lets you predict this with every noun, especially borrowed words like catering. In many cases, you just have to learn the article with the noun.

Because the subject is de catering, which is grammatically third-person singular.

The infinitive is serveren. In the present tense:

• ik serveer
• jij serveert / serveer je
• hij/zij/het serveert
• de catering serveert

So serveert means serves.

Yes. Serveren is closely related to English to serve and has a very similar meaning.

So:

• serveren = to serve
• serveert = serves / is serving

This is one of those Dutch words that is easy for English speakers to recognize.

A borrelhap is a small savory snack eaten with drinks, especially alcoholic drinks, in a social setting.

A borrel is a drink or casual drinks gathering, and a hap is literally a bite or snack. So a borrelhap is basically a snack for with drinks.

Common examples might be:

• cubes of cheese
• bitterballen
• olives
• small sausages
• pieces of bread with toppings

Because Dutch very often forms compound nouns by writing them as one word.

So:

• borrel
  • hap = borrelhap

This is very normal in Dutch. English often uses separate words where Dutch prefers a compound.

Yes. Borrelhapje is a diminutive form and often sounds more natural, since these snacks are usually small.

• borrelhap = snack with drinks
• borrelhapje = little snack / small appetizer

In real-life Dutch, people may often use borrelhapje or the plural borrelhapjes.

Yes, Dutch can use either singular or plural depending on the situation.

• een borrelhap = one snack / a snack item
• borrelhapjes = snacks / appetizers

In practice, if a caterer is offering multiple items, the plural may sound more natural:

• De catering serveert borrelhapjes.

But the singular is still grammatically correct if the speaker is talking about a snack item in a general or specific sense.

Yes, this is the normal Dutch main clause word order:

subject + verb + object

• De catering = subject
• serveert = finite verb
• een borrelhap = object

This is the same basic order English uses in a simple sentence:

• The catering service serves a snack.

Not exactly. In normal speech, een as an article is usually pronounced more like a weak uhn or ən, not like English one.

So in this sentence, een borrelhap is usually said with an unstressed een.

This is different from the number één meaning one, which is stressed more clearly.

It is an English loanword used in Dutch. Dutch uses many loanwords from English, especially in business, food, and hospitality contexts.

Even though it comes from English, it behaves like a normal Dutch noun:

• it takes an article: de catering
• it can be the subject of a sentence
• it follows Dutch grammar rules

Yes, it is grammatical and understandable. However, depending on context, a native speaker might also say something slightly more specific, such as:

• De cateraar serveert borrelhapjes.
• De catering verzorgt de borrelhapjes.
• De catering serveert snacks bij de borrel.

So your sentence is fine, but in real life Dutch there are a few other natural ways to express the same idea.