Arroz con leche y naranjas in this occasion is
a rice pudding that is served with
fresh citrus is currently in season.
It's totally substitutable.
You can use whatever food is in season.
It's 1 of the first deserts
that I probably had in my entire life.
You can have it for breakfast,
you can have it as a snack.
There's no real right or wrong way to eat