Cut the vegetables
15 minPreheat the oven to 200°C / 390°F. Cut the potatoes, with their skins on, into 4 cm pieces and the carrots into 5 cm batons. Peel the celeriac and cut it into 3 cm cubes. Peel the shallots and leave them whole. Lightly crush the garlic cloves, leaving their skins on.