Niluto ni Nanay ang keso at itlog sa kawali para sa mabilis na meryenda.

Niluto is the object-focus completed-aspect form of luto (to cook).

In this sentence, the thing being cooked—ang keso at itlog—is the grammatical focus, so niluto is the natural choice.

• Niluto ni Nanay ang keso at itlog = Mom cooked the cheese and egg(s).
• Nagluto si Nanay ng keso at itlog = Mom cooked cheese and egg(s).

Both can be correct, but they organize the sentence differently:

• niluto highlights the cooked item as the ang-phrase
• nagluto highlights the doer as the si/ang-phrase

So the choice is about focus, not just tense.

Ni marks the agent or doer in this kind of sentence.

Since niluto is object-focus, the thing cooked gets ang, and the person who did the action is marked by ni.

So:

• Niluto ni Nanay ang keso at itlog. = The cheese and egg(s) were cooked by Mom / Mom cooked the cheese and egg(s).

Compare:

• si Nanay is used when Nanay is the focus/topic
• ni Nanay is used when Nanay is the agent in an object-focus sentence

Here, ang marks the grammatical focus of the sentence: the thing cooked.

So in:

• Niluto ni Nanay ang keso at itlog

the phrase ang keso at itlog is the focused noun phrase.

A learner may expect both nouns to have their own marker, but in Filipino, one ang can mark the whole coordinated phrase:

• ang keso at itlog = the cheese and egg(s)

That is completely normal.

Because keso at itlog works as one combined noun phrase.

Filipino often puts the case marker only once before the whole phrase:

• ang keso at itlog
• not usually ang keso at ang itlog unless you want extra emphasis or contrast

So this is similar to English the cheese and eggs, where the only appears once.

It can mean either egg or eggs, depending on context.

In Filipino, nouns usually do not change form for plural the way English nouns do. If you need to make plurality very clear, you can add mga:

• itlog = egg / eggs
• mga itlog = eggs

So ang keso at itlog could be understood as:

• the cheese and egg
• the cheese and eggs

The real meaning depends on the situation.

Sa kawali means in the pan or on the pan, depending on context.

Sa is a very common preposition-like marker that can mean things like:

• in
• on
• at
• to

Here:

• kawali = frying pan / pan
• sa kawali = in the pan

So it tells you the location or place where the cooking happened.

Para sa means for.

So:

• para sa mabilis na meryenda = for a quick snack

It expresses purpose or intended use.

Examples:

• para sa bata = for the child
• para sa hapunan = for dinner
• para sa mabilis na meryenda = for a quick snack

The linker na connects the adjective to the noun.

• mabilis = fast / quick
• meryenda = snack
• mabilis na meryenda = quick snack

In Filipino, adjectives often connect to nouns with na or -ng:

• mabilis na meryenda
• mainit na kape
• maliit na bata

So na is a normal grammar marker here.

Meryenda means snack, usually a light meal eaten between main meals.

It is a very common cultural word in Filipino. It can refer to:

• a morning snack
• an afternoon snack
• sometimes a light meal

So mabilis na meryenda suggests something easy and quick to prepare and eat.

The sentence follows a very natural Filipino pattern:

• Verb
  • agent marker phrase
    • focused noun phrase
      • other details

So:

• Niluto = cooked
• ni Nanay = by Mom / Mom
• ang keso at itlog = the cheese and egg(s)
• sa kawali = in the pan
• para sa mabilis na meryenda = for a quick snack

This Verb-Initial structure is extremely common in Filipino.

Yes, that is close to the structure, but it sounds unnatural in English.

A more natural English translation would be:

• Mom cooked cheese and eggs in a pan for a quick snack.
• or Mom cooked the cheese and egg in the pan for a quick snack.

The Filipino structure is not meant to match English word-for-word. It is better to understand the roles marked by ni, ang, and sa than to translate strictly in order.

Nanay is a common Filipino word for Mom or Mother.

It is capitalized here because it is being used like a name or title for a specific person, similar to English:

• Mom cooked dinner.

If used more generally, it may be lowercase:

• Ang nanay ay nagluluto. = The mother is cooking.

So capitalization depends on whether it is being used as a title/name or as a common noun.