Avui farem una amanida amb enciam, cogombre i pebrot, i l'amanirem amb una mica de vinagre.

Putting Avui first is a very natural way to set the scene: today, this is what we’re going to do.

Catalan word order is fairly flexible, so you could also say Farem una amanida avui..., but starting with Avui sounds very natural when introducing a plan or activity.

Also, the lack of a comma after Avui is normal. With a short time word like this, Catalan often leaves the comma out.

Farem is the future form: we will make / we will do.

• fem = we make / we do or we are making / doing
• farem = we will make / do

The verb is fer, and its future is irregular. It uses the stem far-:

• faré
• faràs
• farà
• farem
• fareu
• faran

So farem una amanida means we will make a salad.

The nouns here are:

• amanida — feminine
• enciam — masculine
• cogombre — masculine
• pebrot — masculine
• vinagre — masculine

That is why you get una amanida.

If you used definite articles, they would be:

• l'amanida
• l'enciam
• el cogombre
• el pebrot
• el vinagre

Even when the article is omitted, the noun still has grammatical gender.

Una amanida means a salad, so the indefinite article is needed.

But in recipe-style language or when listing ingredients in a general way, Catalan often omits the article before the ingredient nouns:

• amb enciam, cogombre i pebrot

This sounds natural when you mean the ingredients in a general sense.

If you were talking about specific items, you would normally use the article:

• amb l'enciam i el cogombre que vam comprar

So the difference is basically:

• generic ingredients → article often omitted
• specific, known items → article usually appears

Yes, but they refer to different things.

• pebrot = the vegetable, usually bell pepper / sweet pepper
• pebre = pepper as a spice or seasoning

English uses pepper for both, but Catalan usually distinguishes them.

So in a salad ingredient list, pebrot is the expected word if you mean the vegetable.

It stands for la, the feminine singular direct object pronoun, referring back to l'amanida.

So:

• l'amanida = the salad
• l'amanirem = we will dress/season it

Why l' and not la? Because la becomes l' before a vowel:

• la amanirem → l'amanirem

So this is the same pronoun, just contracted for sound and spelling.

In Catalan, unstressed object pronouns normally go before a conjugated verb.

So:

• l'amanirem = we will dress it

This is the normal pattern with a finite verb.

English does not do this, so it can feel unusual at first. In English you say we will dress it; in Catalan the it part comes before the verb.

A useful contrast:

• L'amanirem — pronoun before a conjugated verb
• Amaniu-la — pronoun after an affirmative imperative
• Volem amanir-la — pronoun after an infinitive is also possible

So here, l'amanirem is exactly what you should expect.

Yes, they are related.

• amanida = salad
• amanir = to dress / to season, especially food such as salad

In this sentence, the two verbs do different jobs:

• farem una amanida = we will make a salad
• l'amanirem = we will dress/season it

So amanir is not the same as fer. First you make the salad; then you dress it.

With salads, amanir often implies adding things like oil, vinegar, and salt.

Because after a quantity expression like una mica, Catalan normally uses de before the noun.

So:

• una mica de vinagre
• una mica d'oli
• una mica de sal

This works like a bit of vinegar in English.

The pattern is:

• quantity expression + de + noun

So una mica de vinagre is the normal structure.

Because amb is the normal Catalan word for with in both of these meanings:

• una amanida amb enciam, cogombre i pebrot — a salad with lettuce, cucumber, and pepper
• l'amanirem amb una mica de vinagre — we’ll dress it with a little vinegar

So the repetition is completely natural. Catalan is simply using the same preposition in two different but related senses.

Yes. You could say:

• Avui farem una amanida amb enciam, cogombre i pebrot, i amanirem l'amanida amb una mica de vinagre.

That is grammatical, but it sounds more repetitive.

Using l' is more natural because Catalan often replaces a repeated direct object with a pronoun once it is already clear what you are talking about.

So i l'amanirem... is the more natural choice in connected speech.