Questions & Answers about Si quedan moras, las pondré en el postre.
Because this is a real, open condition: if there are any blackberries left. After si in this kind of sentence, Spanish normally uses the indicative, not the subjunctive.
So:
- Si quedan moras, ... = If there are blackberries left, ...
You would not say si queden here.
A useful pattern is:
- Si + present indicative, future / command / present / etc.
- Si llueve, me quedaré en casa.
- Si tengo tiempo, te llamo.
Here quedar means to remain / to be left.
So quedan moras literally means something like:
- blackberries remain
- there are blackberries left
This is a very common use of quedar in Spanish:
- Queda pan. = There is bread left.
- Quedan dos entradas. = There are two tickets left.
Notice the verb agrees with what remains:
- Queda una mora.
- Quedan moras.