तेल में आलू तलिए और मसाला मिलाइए।

They are polite imperative forms, used for giving instructions politely or formally.

In this sentence, they function like:

• तलिए = fry
• मिलाइए = mix / add

This style is very common in:

• recipes
• instructions
• polite commands
• demonstrations

So the sentence is not describing what someone is doing right now. It is telling someone what to do.

The base verbs are:

• तलिए ← तलना = to fry
• मिलाइए ← मिलाना = to mix, to combine, or in cooking often to add and mix in

So if you look them up in a dictionary, you would usually search for:

• तलना
• मिलाना

Hindi uses postpositions, which come after the noun, not before it like English prepositions.

So:

• तेल में = in oil

Compare:

• English: in oil
• Hindi: oil in

That is completely normal Hindi structure.

Also, में here gives the idea of in or in/with the medium of, so तेल में आलू तलिए means fry the potatoes in oil.

Because आलू has the same form in direct singular and direct plural.

So:

• आलू can mean a potato
• आलू can also mean potatoes

You understand the number from context.

In recipe language, ingredients are often used in a general way, so आलू naturally means potatoes here.

For reference, the oblique plural form is आलुओं, as in:

• आलुओं में नमक डालिए = add salt to the potatoes

Not necessarily. In Hindi, मसाला often works like a collective or mass noun.

It can mean:

• spice mixture
• seasoning
• spices as a combined ingredient

So मसाला मिलाइए can naturally mean:

• add the spice mixture
• mix in the spices

If you wanted to emphasize several separate spices, Hindi could also use मसाले, depending on context. But मसाला is very natural in cooking instructions.

It can mean both, depending on context.

In cooking Hindi, मिलाना often means:

• to mix something together
• to add something into another thing and combine it

So in this sentence, मसाला मिलाइए could be understood as:

• add the spices
• mix in the spice mixture

Both are reasonable, and the exact English choice depends on how the translation is being phrased.

Because in Hindi imperatives, the subject is often left out when it is obvious.

Here, the implied subject is:

• आप = you (polite)

So the full idea is something like:

• आप तेल में आलू तलिए और मसाला मिलाइए।

But Hindi usually drops आप because the verb endings already show that this is a polite instruction.

Hindi normally puts the verb later in the sentence, often near the end.

So the pattern here is roughly:

• तेल में = in oil
• आलू = potatoes
• तलिए = fry

This is very typical Hindi word order.

A literal structure would be:

• In oil potatoes fry and spice add

That sounds strange in English, but it is normal in Hindi.

Also, Hindi word order is somewhat flexible, but recipe instructions often prefer this compact, natural ordering.

Yes. और simply connects the two actions:

• आलू तलिए = fry the potatoes
• और मसाला मिलाइए = and add/mix the spices

So it joins two commands in one sentence:

1. fry the potatoes
2. add the spices

For tum (casual/informal), you could say:

• तेल में आलू तलो और मसाला मिलाओ।

For tu (very intimate or very informal), it would be even less formal, though that would usually sound wrong for a recipe or instruction.

The sentence you were given uses polite instructional Hindi, which is exactly what you would expect in:

• recipes
• cookbooks
• demonstrations
• polite spoken instructions

So तलिए and मिलाइए are the most appropriate style here.