I'm just starting with pressure cooking after receiving one as a gift. I plan to make vegetable stock and I'm wondering what to do with the vegetables after it's finished. In one blog they recommend discarding them, but I hate to throw out food if it's still usable. Can they be pureed and used in what I'm making (squash soup in this case)? Or would they taste bad and have everything leached out of them? Or does it depend on the situation (what vegetables, length of time cooked, etc.)? I can't seem to find an answer to this question anywhere; maybe it's because there's no clear answer.

In this case I'm using an Instant Pot Luxe Mini and will put celery, carrots, tomato, onions, bay leaf, maybe mushrooms; brown them; and pressure-cook for 15 minutes.

Also if anyone has a good vegetable stock recipe, I'd love to know about it. Right now I'm just pulling some recipes off the internet (most only have a few ratings) and am making the easiest one.

Thanks!