Para el desayuno, prefiero yogur natural con miel.

Para el desayuno means for breakfast. It sounds natural when you are talking about your preference for that meal in general.

• Para el desayuno, prefiero... = For breakfast, I prefer...
• En el desayuno usually means at breakfast or during breakfast, so it focuses more on the time or setting.
• Just Desayuno by itself would not work here in the same way.

So para is being used to show what meal this preference applies to.

The comma is used because Para el desayuno has been moved to the front of the sentence for emphasis or topic-setting.

The more neutral order would be:

Prefiero yogur natural con miel para el desayuno.

But Spanish often puts this kind of phrase first:

Para el desayuno, prefiero yogur natural con miel.

That comma helps separate the introductory phrase from the main sentence.

In Spanish, meal names often take the definite article when speaking generally:

• el desayuno = breakfast
• la comida = lunch / main meal
• la cena = dinner

So para el desayuno is the normal way to say for breakfast.

English often leaves the article out, but Spanish commonly keeps it.

Spanish usually leaves out subject pronouns when they are not needed.

• Prefiero already means I prefer
• The ending -o tells you the subject is I

So yo prefiero is possible, but it is only used when you want extra emphasis, contrast, or clarity.

For example:

• Yo prefiero yogur; él prefiere tostadas.

In your sentence, prefiero alone is the most natural choice.

Yes. It comes from preferir, and this verb has a stem change: e → ie in many present-tense forms.

Present tense:

• yo prefiero
• tú prefieres
• él / ella / usted prefiere
• nosotros preferimos
• vosotros preferís
• ellos / ellas / ustedes prefieren

Notice that nosotros and vosotros do not change the stem.

In Spanish, adjectives usually come after the noun, unlike in English.

So:

• yogur natural = plain / natural yogurt
• miel natural = natural honey

Putting the adjective after the noun is the normal pattern. Sometimes adjectives can go before the noun, but that usually changes the tone or meaning. Here, yogur natural is the standard expression.

Here, yogur natural usually means plain yogurt.

Even though natural literally looks like natural, in food contexts in Spanish it often means the product is unflavoured or plain.

So yogur natural is what you would normally buy if you want plain yogurt, not strawberry, vanilla, etc.

Spanish often leaves out the article after verbs like preferir, especially when talking about something in a general way.

So:

• Prefiero yogur natural con miel. = I prefer plain yogurt with honey.

This sounds like a general preference.

If you said:

• Prefiero el yogur natural con miel.

that could sound more specific, as if you mean the plain yogurt with honey in contrast to something else.

Both are possible, but the version without the article is very natural for general likes and preferences.

Because miel is being used in a general, non-specific way.

• con miel = with honey

You are not talking about one specific honey already mentioned, so no article is needed.

If you said con la miel, it would usually mean a specific honey:

• la miel que compramos ayer
• la miel de esa marca

In your sentence, con miel is the normal choice.

Yes. In Spanish, both yogur and yogurt exist, but in Spain yogur is very common and widely accepted.

You may also occasionally see yoghurt, but that spelling is much less adapted to Spanish and feels more foreign.

For a learner of Spanish from Spain, yogur is an excellent form to use.

Yes, absolutely.

• Para el desayuno = for breakfast
• Para desayunar = for having breakfast / for breakfast

Both are correct, but they are structured differently:

• Para el desayuno uses a noun phrase
• Para desayunar uses an infinitive verb

Both sound natural. Your original sentence is slightly more straightforward for beginners.

Yes. Spanish word order is flexible, although some versions sound more neutral than others.

Possible versions:

• Para el desayuno, prefiero yogur natural con miel.
• Prefiero yogur natural con miel para el desayuno.

Both are correct.

The original version puts the focus first on breakfast as the context. The second version starts more directly with I prefer. Neither changes the core meaning much.

Yes. It is completely natural in Spain.

A few points that fit Spain Spanish well:

• yogur natural is a very normal expression
• prefiero is standard and neutral
• para el desayuno sounds natural and common

There is nothing in the sentence that would sound odd in Spain. It is clear, everyday Spanish.