Questions & Answers about Moramo nasjeckati dva luka.
Why is it luka and not a plural form like lukovi?
In Croatian, the numbers 2, 3, and 4 (and higher numbers ending in them, like 22 or 43) are followed by the genitive singular for masculine and neuter nouns. Because luk is a masculine noun, it takes the genitive singular form luka. If the recipe called for 5 onions, it would take the genitive plural: pet lukova.
Why use the verb nasjeckati instead of just sjeckati?
Nasjeckati is the perfective aspect, which focuses on the completed result of an action. You use it here because you want to finish the task of chopping the onions. Sjeckati is imperfective and focuses on the ongoing process of chopping, which you would use in a sentence like 'I was chopping onions when the phone rang.'
Does the word luk only mean onion in Croatian?
In a kitchen context, luk on its own almost always means an onion. To be specific, people sometimes call it crveni luk (red onion, though it usually refers to standard yellow onions). Garlic is češnjak, but in some regions it is called bijeli luk (white onion). Outside of cooking, luk also means a bow (as in a bow and arrow) or an arch.
Could we use trebamo instead of moramo in this sentence?
Yes, Trebamo nasjeckati dva luka is perfectly natural. Morati expresses a strict obligation (we must), while trebati translates more closely to 'we need to' or 'we ought to'. When following a recipe, the difference is very subtle and both are commonly used.