I have been using mashed potatoes to thicken any soups that I make. They are thicker, more decadent, and seem like they are 'cream of potato' soup, or 'cream of broccoli' soup, or whatever.
Steaming or boiling broccoli, potatotes, cauliflower (or a combo of any of these and other veggies) in water or veggie broth, adding seasonings, and then adding leftover mashed potatoes at the end is making me some very yummy soups.
Add a scoop or two of potatoes at a time til it's the consistency you want. I do it at the end, and keep heating, just until the potatoes have disappeared into a thick broth and are heated through.
If this has already been posted, please forgive this newb. lol
I just had to share it since it is bringing me so much joy. I am dreaming up new ways to use the mashed potato thickener idea.

Does anyone else do this, and if so, what other dishes do you thicken with the potatoes?