Heat the oven to fan 180C
First, peel the celeriac, chop into small cubes, then add to a baking tray.
In a separate tray, add onion and a whole garlic bulb.
Toss the celeriac and onion with olive oil, salt and pepper.
Roast the celeriac for approx 50 minutes or until it’s cooked and golden brown.
Remove the garlic and onions after 25- 30 minutes
Reserve a 1/4 of the roast celeriac