kono korokke ni ha soosu wo sukosi kakeru dake de zyuubun oisii.

には is に + は.

Here, に marks the target/surface that the sauce is put on: this croquette.
Then は adds a topic or contrast nuance.

So このコロッケには feels like:

• as for this croquette
• on this croquette
• when it comes to this croquette

It can also imply contrast, like: This croquette, at least, only needs a little sauce.

Without は, このコロッケに would sound more neutral and purely grammatical. With には, the speaker is highlighting this croquette in particular.

Because ソース is the thing being applied, so it is the direct object of かける.

• ソースをかける = to pour/apply sauce
• を marks what is being put on something

So:

• このコロッケにソースをかける = put sauce on this croquette

Using が here would not fit normal grammar for this verb in this sentence.

少し means a little or a small amount.

In this sentence, it modifies かける, specifically the amount of sauce being applied:

• ソースを少しかける = to put a little sauce on it

So it is not saying the action is small in some vague sense; it is specifically saying the amount of sauce is small.

だけ means only / just.
で here shows means, cause, or the condition under which something is enough.

So ソースを少しかけるだけで means:

• just by putting a little sauce on it
• with only a little sauce added
• all it takes is a little sauce

The nuance is that nothing more is necessary.

Because だけ attaches directly to the plain form of the verb:

• かけるだけ = just put/apply
• 食べるだけ = just eat
• 見るだけ = just look

Then で is added:

• かけるだけで = just by putting/applying

So だけで is already a complete grammar pattern here. You do not need する.

十分 means enough / sufficiently / plenty.

So 十分おいしい means:

• is sufficiently tasty
• is tasty enough
• is plenty delicious

The idea is: even with only a little sauce, it already tastes very good. No extra seasoning or effort is needed.

Both 十分おいしい and 十分においしい are possible.

• 十分おいしい is very natural and common
• 十分においしい is a bit more explicitly adverbial and may sound slightly more formal or deliberate

In everyday speech, leaving out に is very common with words like 十分 when they modify adjectives.

So this sentence sounds natural as written.

Here, で connects the idea of just doing X with the result it is enough / it is tasty enough.

You can think of it like:

• X だけで Y = Y with just X / Y simply by X

So:

• ソースを少しかけるだけで十分おいしい = It’s delicious enough with just a little sauce = Just adding a little sauce is enough for it to taste delicious

This で is not the location marker. It is showing the condition or means.

Japanese often leaves out information that is obvious from context.

A few things are omitted here:

1. The subject

   • It could be understood as this croquette.
   • In natural English, we might say This croquette is delicious enough...

2. The object of かける after the first noun phrase

   • More literally, the action is put sauce on this croquette.
   • Japanese does not need to repeat it.

So a fuller underlying structure would be something like:

• このコロッケには、ソースを少しかけるだけで、（このコロッケは）十分おいしい。

But the omitted version is much more natural.

In this context, かける means to pour/sprinkle/apply over something.

With sauce, common translations are:

• put sauce on
• pour sauce over
• add sauce to

So:

• ソースをかける = to put/pour sauce on it

The exact English word depends on the situation, but the Japanese is very natural for food toppings or sauces.

Japanese often builds the sentence by stacking information before the main predicate.

Here the structure is roughly:

• このコロッケには = as for this croquette
• ソースを少しかけるだけで = with just a little sauce added
• 十分おいしい = it is delicious enough

Japanese usually places the main descriptive word, here おいしい, near the end.

So even though the English order may be different, the Japanese order is normal: topic -> condition/method -> result

Yes, that is a very natural translation.

Other good translations include:

• This croquette is plenty tasty with just a little sauce.
• Just a little sauce is enough to make this croquette delicious.
• For this croquette, all you need is a little sauce for it to be delicious.

The exact wording changes, but the core meaning is the same: you do not need much; a little sauce is enough.

Yes. この means this, so it points to a specific croquette near the speaker or in the current context.

It gives the sentence a concrete, immediate feeling:

• this croquette here
• this particular croquette

If it were その or あの, the reference would change:

• そのコロッケ = that croquette near you / previously mentioned
• あのコロッケ = that croquette over there

So この helps anchor the sentence to a specific item the speaker is talking about.

Yes, very possibly.

は often adds a contrastive nuance, even if no direct comparison is stated.

So このコロッケには may suggest something like:

• As for this croquette, just a little sauce is enough
• maybe unlike some other croquettes, which might need more seasoning

The sentence does not force a comparison, but it leaves room for that feeling. That is one reason には sounds more nuanced than plain に.