Otočte steak grilovacími kleštěmi.

Otočit is the dictionary form, meaning to turn / to flip.
Otočte is the imperative form, so it means turn! / flip!

In this sentence, it is a command or instruction, like in a recipe or on a grill:

• otočit = to flip
• otočte = flip!

It is also the formal singular or plural imperative, so it can mean:

• Flip the steak! (said politely to one person)
• Flip the steak! (said to several people)

Because the sentence is giving an instruction, not describing what someone is doing.

• otáčíte steak = you are flipping / you flip the steak
• otočte steak = flip the steak

Recipes, manuals, and instructions commonly use the imperative in Czech, just like English does.

This is mainly a matter of aspect.

• otočte comes from otočit (perfective)
• otáčejte comes from otáčet (imperfective)

In many contexts:

• otočte steak suggests flip it over once or complete the action
• otáčejte steak can suggest keep turning it, turn it repeatedly, or focus more on the ongoing action

For a single grilling instruction, otočte is very natural because it refers to one completed flip.

Here steak is the direct object, and with this verb it is in the accusative case. For many inanimate masculine nouns in Czech, the accusative singular is the same as the nominative singular.

So:

• steak = nominative
• steak = accusative

That is why it stays the same in this sentence.

That phrase is in the instrumental case.

Czech often uses the instrumental to express the tool or means used to do something:

• Otočte steak grilovacími kleštěmi.
• Flip the steak with grilling tongs.

So grilovacími kleštěmi means with grilling tongs.

This is a very common Czech pattern:

• psát perem = to write with a pen
• jíst vidličkou = to eat with a fork
• otevřít dveře klíčem = to open the door with a key

Because kleště is a plural noun. In Czech, tongs are treated like a plural item, similar to how English says tongs rather than a tong.

Since kleště is plural, the adjective has to agree with it:

• grilovací kleště = grilling tongs
• grilovacími kleštěmi = with grilling tongs

Both words are in the instrumental plural.

Yes, normally kleště is a plural-only noun in Czech. It behaves much like:

• English scissors
• English tongs
• English pliers

So you usually use plural forms with it:

• Ty kleště jsou nové. = Those pliers/tongs are new.
• Pracuji kleštěmi. = I work with pliers/tongs.

That is why you see kleštěmi, not a singular form.

Because Czech often expresses that meaning through the instrumental case alone.

English needs a preposition:

• with grilling tongs

Czech can simply use the noun in the instrumental:

• grilovacími kleštěmi

So the with idea is built into the case ending.

Yes. Czech word order is more flexible than English word order.

The neutral version here is:

• Otočte steak grilovacími kleštěmi.

But other orders are possible, depending on emphasis:

• Grilovacími kleštěmi otočte steak.
• Steak otočte grilovacími kleštěmi.

All of these can mean the same basic thing: Flip the steak with grilling tongs.
The difference is mainly in focus or style, not core meaning.

Czech has no articles like English a/an/the.

So steak can mean:

• a steak
• the steak

The exact meaning comes from the context. In a cooking instruction, steak is naturally understood as the steak being cooked.

Yes. Grilovací is an adjective meaning something like for grilling / grilling-related.

So:

• grilovací kleště = grilling tongs
• grilovací rošt = grill rack
• grilovací koření = grilling seasoning

It is a very natural adjective in cooking contexts.

Then you would usually use the informal singular imperative:

• Otoč steak grilovacími kleštěmi.

Compare:

• otoč = informal singular
• otočte = formal singular or plural

So the original sentence sounds like a polite instruction, a public instruction, or an instruction to more than one person.