Ben kahvaltıda yoğurt ve muz yiyorum.

Yes, it can be omitted.

In Turkish, the verb ending in yiyorum already shows that the subject is I. So:

• Ben kahvaltıda yoğurt ve muz yiyorum.
• Kahvaltıda yoğurt ve muz yiyorum.

Both are natural.

Using ben often adds emphasis, contrast, or clarity, such as if you are contrasting yourself with someone else.

Kahvaltı means breakfast.

The ending -da is the locative suffix, which usually means in, at, on. So kahvaltıda literally means at breakfast.

In English, this is often translated more naturally as for breakfast in sentences like this.

So the structure is:

• kahvaltı = breakfast
• kahvaltıda = at breakfast / for breakfast

Turkish often expresses this idea with a suffix instead of a separate word.

Because Turkish normally prefers subject + other information + object + verb order, with the verb often coming last.

So this sentence is structured like:

• Ben = I
• kahvaltıda = at breakfast / for breakfast
• yoğurt ve muz = yogurt and banana
• yiyorum = I am eating

This verb-final order is very typical in Turkish.

It comes from the verb yemek, which means to eat.

A simple breakdown is:

• ye- = eat
• -iyor = present continuous marker
• -um = I

Together:

• ye + iyor + um → yiyorum

So yiyorum means I am eating.

Literally, yiyorum is the present continuous, so its basic meaning is I am eating.

However, depending on context, Turkish present continuous can sometimes sound natural for a current routine or something you are doing these days. So in context, it may be understood a bit like I eat yogurt and banana for breakfast.

That said, for a more general habitual meaning, Turkish often uses the aorist:

• Ben kahvaltıda yoğurt ve muz yerim. = I eat yogurt and banana for breakfast.

So:

• yiyorum = more like I am eating / I’m currently eating / I’m in the habit of eating these days
• yerim = more like I eat / I usually eat

Because they are being used as indefinite, non-specific direct objects.

In Turkish, a direct object often stays unmarked if it is general or non-specific:

• yoğurt ve muz yiyorum = I am eating yogurt and banana

If you were talking about specific ones, you would usually use the accusative ending:

• yoğurdu ve muzu yiyorum = I am eating the yogurt and the banana

So the lack of an ending here suggests a general food item, not a specific known yogurt and a specific known banana.

Turkish often uses a bare noun in food sentences where English might say a banana or bananas.

So muz here can simply mean banana as a food item, without focusing on exact number.

Compare:

• muz yiyorum = I am eating banana / bananas / some banana, depending on context
• bir muz yiyorum = I am eating one banana
• muzlar yiyorum = this is much less natural in this kind of sentence unless you mean specific bananas in a special context

With food, Turkish often sounds more natural than English if it stays general.

In modern Turkish, ğ is usually not pronounced like a hard g in English.

In yoğurt, it usually softens the word and may lengthen the vowel a little or create a slight glide. So it is closer to:

• yo-urt
• or a slightly lengthened yoo-urt

It is not a strong g sound.

This letter is often called yumuşak g, meaning soft g.

The letter ı is different from i.

• i = like the vowel in machine
• ı = a back, relaxed vowel with no exact English equivalent

It is somewhat like a short, dull uh sound, but produced farther back in the mouth.

So kahvaltıda is approximately:

• kah-vahl-tuh-duh

That is only an approximation, but it helps English speakers get close.

Yes, very normal.

Turkish often uses the locative form with meal words to mean at that meal:

• kahvaltıda = at breakfast / for breakfast
• öğle yemeğinde = at lunch
• akşam yemeğinde = at dinner

If you say kahvaltı için, that usually means for breakfast in the sense of intended for breakfast, not necessarily eaten at breakfast.

So in this sentence, kahvaltıda is the natural choice.

Yes, Turkish word order is flexible, but changing it changes emphasis.

The most neutral versions are:

• Ben kahvaltıda yoğurt ve muz yiyorum.
• Kahvaltıda yoğurt ve muz yiyorum.

Other orders are possible, but they may sound more marked or emphasize a different part of the sentence.

So learners should treat this sentence as a good, natural default pattern: time expression + object + verb.