Saya suka tumis kubis dengan telur untuk makan siang.

Both mean I, but they differ in tone.

• saya = neutral, polite, standard
• aku = more informal and personal

So Saya suka tumis kubis dengan telur untuk makan siang sounds neutral and safe in most situations.
A more casual version would be Aku suka tumis kubis dengan telur untuk makan siang.

Here, tumis is best understood as part of a food name: tumis kubis = stir-fried cabbage or a cabbage stir-fry.

Even though tumis comes from the idea of stir-frying, in this sentence it works like a dish label, not mainly as the action to stir-fry.

So this sentence is about liking the dish, not necessarily about liking the activity of cooking it.

Menumis is the active verb to stir-fry.

• Saya suka menumis kubis... = I like stir-frying cabbage...
• Saya suka tumis kubis... = I like cabbage stir-fry...

So dropping meN- changes the feel. In your sentence, tumis kubis is understood as food. If you wanted to talk about the action of cooking, menumis would be clearer.

Food names in Indonesian are not always built in one single pattern.

Some common dishes have the ingredient first, such as:

• pisang goreng = fried banana
• ikan bakar = grilled fish

But others commonly have the cooking style first, such as:

• tumis kangkung
• tumis buncis
• tumis kubis

So tumis kubis is just a normal, established way to name that dish. It is something you largely learn as a set expression.

Dengan means with. In food contexts, it can be somewhat flexible.

So tumis kubis dengan telur can mean:

• cabbage stir-fry cooked with egg
• cabbage stir-fry served with egg

Usually, context tells you which is meant. In everyday use, people often understand it as the dish includes egg as an ingredient or accompaniment.

It can mean either. Indonesian nouns usually do not have a special singular/plural form the way English does.

So telur could mean:

• egg
• eggs

If the speaker wants to be specific, they can add a number:

• satu telur = one egg
• dua telur = two eggs

In your sentence, the exact number is simply not important.

It means for lunch.

Literally:

• untuk = for
• makan siang = lunch / to have lunch

So the phrase tells you the meal occasion. It means this is something the speaker likes as a lunch food.

If you wanted to emphasize time more directly, Indonesian might also use something like:

• saat makan siang = at lunchtime / when having lunch

But untuk makan siang is perfectly understandable for for lunch.

It can function as either, depending on context.

• As a noun: lunch
• As a verb phrase: to have lunch

In untuk makan siang, it is functioning more like for lunch, so it is being treated as the meal occasion.

This kind of flexibility is very common in Indonesian.

Indonesian usually does not use articles like English a, an, and the.

So:

• tumis kubis can mean stir-fried cabbage, a cabbage stir-fry, or the cabbage stir-fry, depending on context.
• telur can mean egg, an egg, the egg, or eggs, again depending on context.

Learners often want every noun to be marked the way English does, but Indonesian usually leaves that information unstated unless it matters.

Not necessarily.

• Saya suka tumis kubis... = I like cabbage stir-fry...
• Saya suka makan tumis kubis... = I like eating cabbage stir-fry...

Your sentence is fine if the idea is that the speaker likes that dish.
If you want to stress the act of eating it for lunch, adding makan makes that clearer.

For example:

• Saya suka makan tumis kubis dengan telur saat makan siang.

That version more explicitly means I like eating stir-fried cabbage with egg at lunch.

Yes. In many places, kol is a very common everyday word for cabbage.

So you may hear:

• tumis kubis
• tumis kol

Both are understandable.
Very generally:

• kubis sounds a bit more standard/dictionary-like
• kol sounds more casual and common in daily speech

Which one you hear more can also depend on region and habit.

Yes, it is natural and understandable.

It sounds like a normal way to say that the speaker likes cabbage stir-fry with egg for lunch.

If you wanted to make the meaning a little more explicit, you could also say:

• Saya suka makan tumis kubis dengan telur untuk makan siang.
• Saya suka tumis kubis dengan telur sebagai menu makan siang.

But your original sentence is already good and natural.