Quan tot estigui a punt, seurem a taula i tastarem el que ha preparat la meva germana.

Because in Catalan, when quan refers to a future situation, it often triggers the subjunctive.

So:

• Quan tot està a punt = When everything is ready / When everything is already ready
• Quan tot estigui a punt = When everything is ready in the sense of when it becomes ready / once it is ready in the future

In this sentence, the whole event is still in the future:

• first, everything will be ready
• then, we will sit down
• then, we will taste the food

That is why Catalan uses estigui rather than the present indicative està.

A punt means ready.

So:

• tot estigui a punt = everything is ready

It is a very common expression in Catalan. Literally, it is something like at the point, but you should learn it as a fixed phrase meaning ready.

Examples:

• El sopar és a punt. = Dinner is ready.
• Ja estic a punt. = I’m ready now.

Catalan normally uses estar with states like being ready, especially with expressions such as estar a punt.

So:

• estar a punt = to be ready
• ser would not be natural here

This is similar to many cases where Catalan uses estar for a temporary state or condition.

Seurem means we will sit or we will sit down.

It comes from the verb seure, meaning to sit.

Here it is in the future tense:

• seuré = I will sit
• seuràs = you will sit
• seurà = he/she will sit
• seurem = we will sit
• seureu = you all will sit
• seuran = they will sit

So seurem a taula means we will sit at the table or more naturally we’ll sit down at the table.

Seure a taula is an idiomatic expression meaning to sit down at the table, especially to eat.

So:

• seurem a taula = we’ll sit down at the table

Using a la taula is possible in other contexts when you mean a specific physical table, but seure a taula is the usual expression for sitting down to eat.

Compare:

• Seiem a taula. = We sit down at the table / for a meal.
• El llibre és a la taula. = The book is on the table.

Tastarem comes from tastar, which means to taste.

So:

• tastarem = we will taste

In context, it can suggest trying the food, sampling it, or tasting what she has made. It does not literally mean eat in the general sense, though in a meal context it may overlap a bit.

Compare:

• menjarem = we will eat
• provarem = we will try
• tastarem = we will taste

Using tastarem gives the sentence a slightly more specific sense: we are going to taste what the sister prepared.

El que means what or that which.

So:

• tastarem el que ha preparat la meva germana = we will taste what my sister has prepared

This is a very common structure in Catalan.

Examples:

• No entenc el que dius. = I don’t understand what you’re saying.
• Menja’t el que vulguis. = Eat what you want.

A useful way to remember it is:

• el que = the thing that / what

Ha preparat is the present perfect: has prepared.

In this sentence, it refers to something that will already be completed by the time the future action happens. In English, we often also say:

• we will taste what my sister has prepared

Catalan commonly uses present perfect here because, from the speaker’s point of view, the preparation is a completed action relevant to the moment of tasting.

Other options would change the feel:

• va preparar = prepared / did prepare — sounds more like a finished past event
• prepararà = will prepare — would mean she has not prepared it yet

So ha preparat fits well: by the time we sit down, the food is understood to be ready and already prepared.

Catalan usually uses the definite article with possessives:

• la meva germana = my sister
• el meu pare = my father
• la nostra casa = our house

This is one of the big differences from English, where we normally say just my sister without the.

So for English speakers, it may feel strange at first, but it is normal Catalan.

One note: in some family terms, especially in certain contexts or varieties, the article may be omitted, but la meva germana is completely standard and very common.

Mostly yes, but it mixes a future time frame with a completed prior action.

Breakdown:

• Quan tot estigui a punt = future reference, expressed with the subjunctive
• seurem = future
• tastarem = future
• ha preparat = present perfect, referring to something completed before the tasting

So the timeline is:

1. everything becomes ready
2. we sit down
3. we taste
4. the sister’s preparation is already complete by then

This kind of mix is very natural in Catalan.

A natural translation would be:

• When everything is ready, we’ll sit down at the table and taste what my sister has prepared.

Depending on context, you could also say:

• Once everything is ready, we’ll sit down at the table and taste what my sister made.
• When everything’s ready, we’ll sit down to eat and taste what my sister has prepared.

The Catalan sentence has a smooth, natural domestic feel, especially around a shared meal.