На ужин я приготовил пюре и курицу.

На ужин is a very common Russian expression meaning for dinner.

Here, на + accusative is used to show purpose or intended occasion:

• на завтрак = for breakfast
• на обед = for lunch
• на ужин = for dinner

So На ужин я приготовил... literally feels like For dinner, I prepared...

This is different from talking about location, where на can mean on/at.

Ужин is in the accusative case.

In the phrase на ужин, the preposition на takes the accusative when it means something like for or for the occasion of.

So:

• nominative: ужин
• accusative: ужин

Since ужин is an inanimate masculine noun, its accusative looks the same as the nominative.

Приготовил is the past tense, and the ending tells you the speaker is masculine.

In Russian past tense, verbs agree with gender and number:

• приготовил = a man says prepared
• приготовила = a woman says prepared
• приготовило = it prepared
• приготовили = they prepared

So я приготовил means I prepared, said by a male speaker.

Yes, Russian often can omit the subject pronoun when it is clear from context.

So both are possible:

• На ужин я приготовил пюре и курицу.
• На ужин приготовил пюре и курицу.

Including я can make the subject a bit more explicit or contrastive:

• Я приготовил, not someone else.

English usually needs I, but Russian is more flexible.

Because it is the direct object of the verb приготовил, so it goes into the accusative case.

Курица is a feminine noun, and its accusative singular is:

• nominative: курица
• accusative: курицу

So:

• Я приготовил курицу = I prepared chicken

This is one of the common feminine accusative patterns:

• мама → маму
• книга → книгу
• курица → курицу

Пюре is an indeclinable noun, which means it usually keeps the same form in different cases.

So here, even though it is also a direct object, it stays пюре.

This is common with some borrowed words in Russian. So you may see:

• люблю пюре
• нет пюре
• с пюре

The form stays the same.

Both are functioning as direct objects, so they are in the accusative case.

• пюре = accusative, but unchanged because it is indeclinable
• курицу = accusative feminine singular

So the structure is:

• я приготовил = I prepared
• пюре и курицу = mashed potatoes and chicken

Приготовил is perfective, which means the action is viewed as completed.

So я приготовил means:

• I prepared it
• I finished making it

If you used готовил instead, that is imperfective, and the meaning would shift:

• Я готовил пюре и курицу = I was cooking / I used to cook / I was in the process of cooking mashed potatoes and chicken

So in a simple statement about what was made for dinner, приготовил is very natural because it emphasizes the completed result.

Russian has no articles.

English says:

• I prepared the chicken
• I prepared a chicken
• I prepared chicken

Russian simply says я приготовил курицу, and the exact meaning depends on context.

The same goes for пюре:

• пюре could mean mashed potatoes, the mashed potatoes, or some mashed potatoes, depending on the situation.

Yes. Russian word order is much more flexible than English word order.

This sentence can be rearranged in several ways:

• На ужин я приготовил пюре и курицу.
• Я приготовил на ужин пюре и курицу.
• Пюре и курицу я приготовил на ужин.

The basic meaning stays the same, but the emphasis changes:

• На ужин first highlights for dinner
• Я first highlights I
• Пюре и курицу first highlights what was prepared

So the original sentence is natural, but not the only possible order.

It usually means chicken as food, but the exact image depends on context.

In everyday speech, я приготовил курицу can mean:

• I cooked chicken meat
• I made a chicken dish
• I cooked a chicken

Russian often leaves that a bit general unless more detail is added, for example:

• куриное филе = chicken fillet
• жареную курицу = fried chicken
• целую курицу = a whole chicken

So курицу here is perfectly natural, even if it sounds a little broad in isolation.

Usually, yes.

By itself, пюре can mean purée in a general sense, but in everyday food contexts it very often means mashed potatoes.

If someone wants to be more explicit, they can say:

• картофельное пюре = mashed potatoes

But in a sentence about dinner, пюре alone is completely normal and commonly understood as mashed potatoes.

Yes. И is the standard Russian word for and.

Here it simply joins two direct objects:

• пюре и курицу = mashed potatoes and chicken

Nothing unusual is happening with it in this sentence.