Eu gosto de comer torrada com mel no café da manhã.

Because gostar normally requires the preposition de in Portuguese.

So:

• gostar de + noun = to like something
• gostar de + infinitive = to like doing something

Examples:

• Eu gosto de café. = I like coffee.
• Eu gosto de comer. = I like to eat.

So Eu gosto de comer torrada... is the normal, correct structure.
You would not usually say Eu gosto comer.

Because after gosto de, Portuguese uses the infinitive form of the verb.

• comer = to eat
• como = I eat

In this sentence, the idea is I like to eat, not I like I eat. So the infinitive is required:

• Eu gosto de comer torrada. = I like to eat toast.

If you said Eu gosto de como, that would be incorrect.

Yes. In Brazilian Portuguese, subject pronouns are often optional when the verb already makes the subject clear.

So both are possible:

• Eu gosto de comer torrada com mel no café da manhã.
• Gosto de comer torrada com mel no café da manhã.

Both mean the same thing. Including eu can add emphasis, clarity, or contrast:

• Eu gosto, mas ele não. = I like it, but he doesn’t.

In Portuguese, torrada can work a lot like toast in English, especially when speaking generally about the food.

So comer torrada can mean to eat toast in a general sense.

If you want to be more specific or count pieces, you could say:

• uma torrada = a piece of toast / one toast
• duas torradas = two pieces of toast

But in a general statement like this, singular torrada sounds natural.

Portuguese often leaves out the article when talking about food in a general way.

So:

• comer torrada = eat toast
• com mel = with honey

This is similar to English, where we also often say toast with honey, not necessarily the toast with the honey.

You could add articles in other contexts, but that would usually make it more specific:

• a torrada = the toast
• o mel = the honey

In this sentence, the speaker is talking generally about a breakfast preference, so no article is very natural.

No is a contraction of:

• em + o = no

Here it means in the or at the, depending on how we translate it naturally.

So:

• no café da manhã literally = in the breakfast
• natural English meaning = for breakfast / at breakfast

This kind of contraction is very common in Portuguese:

• em + a = na
• em + os = nos
• em + as = nas

Examples:

• no carro = in the car
• na escola = at/in the school

Café da manhã is the standard Portuguese expression for breakfast.

Literally, it breaks down as:

• café = coffee
• da = of the
• manhã = morning

So literally it looks like coffee of the morning, but you should treat it as a fixed expression meaning breakfast.

Other meal names work differently:

• almoço = lunch
• jantar = dinner

So even though the literal words are transparent, the whole expression simply means breakfast.

They are related, but they do not mean the same thing.

• no café da manhã = at breakfast / for breakfast
• de manhã = in the morning

So:

• Eu gosto de comer torrada com mel no café da manhã. = I like to eat toast with honey for breakfast.
• Eu gosto de comer torrada com mel de manhã. = I like to eat toast with honey in the morning.

The second one is broader. It could be any time in the morning, not necessarily as breakfast.

The sentence as given is very natural, but Portuguese allows some flexibility.

Standard order:

• Eu gosto de comer torrada com mel no café da manhã.

You might also hear:

• No café da manhã, eu gosto de comer torrada com mel.
• Eu gosto de comer, no café da manhã, torrada com mel.
  (less neutral in everyday speech)

The most common, neutral version is the original one. Moving parts around usually changes emphasis rather than basic meaning.

A few pronunciation points are especially useful here:

• café has stress on the last syllable: ca-FÉ
• manhã has a nasal ã, which is very important in Portuguese
• the final nh in manhã sounds like the ny sound in canyon or Spanish ñ

A rough guide:

• café da manhã ≈ ka-FEH da man-YAH̃

The nasal vowel in manhã does not exist in English, so learners usually need practice with it. Try not to pronounce it like a plain a. The vowel should sound nasal.

Yes. That changes the strength of the feeling:

• Eu gosto de... = I like...
• Eu adoro... = I love...

So:

• Eu gosto de comer torrada com mel no café da manhã. = I like eating toast with honey for breakfast.
• Eu adoro comer torrada com mel no café da manhã. = I love eating toast with honey for breakfast.

Both are natural. Gosto de is milder and more neutral; adoro is stronger.