@Clomid1 how are you cooking your celeriac?
I make ‘chips’ with it too, but don’t bother with blanching. I just cut the celeriac into chips, into an oven dish with a lot of olive oil, and season well with salt and pepper. Sometimes I add chilli flakes. Roast for around 40 minutes - they eventually go nice and brown, and become really quite sweet. (They’ll never go crisp like potatoes would, though)
I also make mash with it - but have found that if I also add a couple of leeks, which I’ve sliced and fried in butter, that it makes it taste a bit more like potato mash.
And there’s a recipe on one of the threads for celeriac with chorizo, which I seem to remember was very tasty.