How to thicken up a bolognese done in the slow cooker??

[HotChocolatemarshmallows]

I don't normally do anything other than stew in the slow cooker but today I've put a bolognese in as we were out all morning- just checked it and it's all watery and not thick & delicious like normal.
What should I do? I don't have a hob today as we are having a new one fitted tomorrow. How can I fix it and make it more appetising?

Just mix a bit of cornflour with water, and pour the mixture in, that’ll thicken it up

Second the cornflower

Tomato purée?

Gravy granules

Drain some liquid out and add some pasatta .. Worcester sauce abit of gravy granules

Once cooked then turn to warm and leave the lid off for an hour or so . I did this last week with a stew that was not thickening.