Para la ensalada, mi prima añade atún, pimiento y un poco de vinagre.

Spanish often moves a phrase like para la ensalada to the front to set the context first. It is a bit like saying As for the salad... or For the salad... in English.

So:

Para la ensalada, mi prima añade atún, pimiento y un poco de vinagre.

and

Mi prima añade atún, pimiento y un poco de vinagre para la ensalada.

are both possible. The first version just highlights the salad first.

Para la ensalada means for the salad or when making the salad. It focuses on purpose.

En la ensalada means in the salad, which focuses more on location or what is inside it.

In many recipe-like contexts, para la ensalada sounds natural because it introduces ingredients intended for that dish.

The comma separates the introductory phrase Para la ensalada from the main clause.

This is common when Spanish puts a contextual phrase at the beginning. It helps readability and signals that the sentence is starting with background information before getting to the main action.

Yes. Prima means female cousin and primo means male cousin.

So:

• mi prima = my female cousin
• mi primo = my male cousin

English uses cousin for both, but Spanish distinguishes gender here.

Añade comes from the verb añadir, meaning to add.

Here it is the third person singular present form, because the subject is mi prima:

• yo añado = I add
• tú añades = you add
• él / ella añade = he / she adds

So mi prima añade means my cousin adds.

The ñ is pronounced like the ny sound in English canyon, though not exactly identical.

So añade is approximately:

a-NYA-de

The stress falls on the middle syllable: a-ÑA-de.

In Spanish, when listing ingredients, articles are often omitted.

So añade atún, pimiento y un poco de vinagre is very natural, just like English often says add tuna, pepper, and a little vinegar.

You could sometimes see articles in other contexts, but in ingredient lists, leaving them out is very common.

Ingredient words are often singular in Spanish when talking about them as recipe components.

So pimiento here means something like pepper as an ingredient, not necessarily exactly one whole pepper.

If you wanted to emphasize multiple peppers, you could say pimientos, but the singular is very normal in this kind of sentence.

Also, pimiento is the vegetable pepper, while pimienta means pepper as a spice.

Un poco de + noun is a very common structure meaning a little bit of + noun.

So:

• un poco de vinagre = a little vinegar

You need de before the noun in this expression.

Poco vinagre can exist, but it usually sounds more like little vinegar in a more descriptive way. For a recipe or normal statement, un poco de vinagre is the most natural choice.

Atún has a written accent because the stress falls on the last syllable: a-TÚN.

Without the accent mark, Spanish spelling rules would make it sound different. The accent shows the correct stress clearly.

Yes. Añade can also be the tú imperative of añadir, meaning add!

For example:

Añade sal. = Add salt.

But in your sentence, because the subject mi prima is stated, it clearly means my cousin adds, not a command.

Yes. Y means and and joins the last item in a list:

• atún
• pimiento
• un poco de vinagre

Spanish normally does not use the Oxford comma before y, so the sentence naturally appears as:

atún, pimiento y un poco de vinagre

not usually with a comma before y.