Yeah celeriac is fantastic. It can be used as a substitute for pretty much anything you would use a potato in. If you have not tried one, give it a go! It looks fairly terrifying, but can be really tasty. Celeriac oven chips are great and easy to do. I can cook them, and this time last month I did not know how to make an omelette! Get your celeriac, an oven tray, some grease proof paper, some curry powder, vegetable oil and a sharp knife. Preheat your oven to about 200 degrees celcius. If you are eating alone, half of a celeriac should be plenty. 'Peel' it (a potato peeler is probably too much effort, use your sharp knife watch where your fingers are), and cut it into fairly large chunks. Think potato wedges. Some recipes suggest you blanch the wedges (boil in water for a couple of minutes) but I have found mine work just as well missing this step out. Whack the wedges in a bowl or saucepan, and add two or three tablespoons of vegetable or olive oil. Add a bit of curry powder, a teaspoon may be enough but this is up to you really. Stir around for a minute to get the wedges nice and covered in oil and powder (not completely caked in it, that would take way too much curry powder). Spread the wedges evenly on your baking tray and put in your preheated oven for around 40 minutes. When they are starting to brown a little bit they should be ready. Add a bit of salt if you like, and eat! Super low carb, and very tasty.