Why This Traybake Earns Its Place in the Winter Kitchen

Root vegetables are at their sweetest after a cold snap. The plants convert starch to sugar to protect themselves from frost, which is why a parsnip lifted in November tastes nothing like one dug in September. Carrots, parsnips and beetroot all respond beautifully to a hot oven: their edges caramelise, their interiors go soft and nutty, and the whole lot needs nothing more than oil, salt and a good scattering of herbs.

Then there is the halloumi. Because it holds its shape at high heat, it can go into the same tin as the vegetables and come out bronzed and squeaky rather than melted away. You get a proper dinner — substantial, savoury, vaguely virtuous — from one tin and about ten minutes of chopping. It works as a midweek supper, a Sunday side for roast chicken, or a packed lunch the next day straight from the fridge.

The Shopping List

This serves four generously as a main, or six as a side. Everything below is easy to find in a British greengrocer or supermarket from autumn through to early spring.

• 500g carrots, scrubbed but not necessarily peeled
• 400g parsnips, peeled, woody cores removed if large
• 400g raw beetroot — not the cooked, vacuum-packed sort
• 2 red onions, cut into thick wedges with the root left intact
• 4 tbsp olive oil or rapeseed oil
• 2 tsp dried thyme, or a small handful of fresh leaves
• 1 tsp cumin seeds and 1 tsp fennel seeds, lightly crushed
• 1 tbsp runny honey or maple syrup (optional, for a glaze)
• 2 x 225g blocks halloumi, cut into 2cm cubes
• 1 tsp cornflour, for the halloumi
• Flaky sea salt, black pepper, a lemon, and a handful each of flat-leaf parsley and mint

Cutting and Coaxing: The Prep That Matters

Even cooking starts with even chopping. Cut the carrots and parsnips into batons roughly 5cm long and 2cm thick — thicker than a chip, thinner than a roast potato. Halve any carrot that is fatter than your thumb. The parsnips should be cut a shade smaller than the carrots, as they soften faster. Beetroot comes last, into wedges of about 2cm at the widest point.

Beetroot bleeds, and there is no getting around it. Wear an apron, and consider lining the roasting tin with baking parchment so you are not scrubbing magenta stains off the corners for a week. If you would rather your carrots stayed orange, roast the beetroot in its own smaller tin and swap them onto the same shelf.

Tip everything into a large bowl, add the oil, thyme, crushed seeds, a good pinch of salt and several grinds of pepper, and toss with your hands until every piece is glossy. Go easy on the salt — the halloumi will bring plenty of its own.

The Roast: Heat, Space and Timing

Heat the oven to 200°C (180°C fan, gas mark 6) and put your largest roasting tin in to preheat for ten minutes. A hot tin starts the caramelisation the moment the vegetables land on it.

Spread the vegetables in a single layer with space between the pieces. Crowding is the single most common reason a traybake comes out pale and steaming rather than golden and crisp. If your tin is smaller than a sheet of A4, use two tins and rotate them halfway through.

Roast for 35 to 40 minutes in total. Turn everything with a spatula after 20 minutes. If you are using honey, drizzle it over at the 30-minute mark so it caramelises without burning. Tuck in the onion wedges at the start, and add unpeeled garlic cloves with 20 minutes to go if you fancy squeezing the soft flesh over the finished dish.

The vegetables are ready when a knife slides into the thickest parsnip with no resistance and the edges are dark and sticky. If in doubt, give them another five minutes. Undercooked roots are a disappointment; slightly caught ones are delicious.

Halloumi: Golden, Not Rubbery

Pat the halloumi cubes thoroughly dry with kitchen paper — the drier the surface, the better the crust. Toss them in a bowl with a teaspoon of oil and the cornflour until lightly dusted.

Add them to the tin for the final 12 to 15 minutes, nudging the vegetables aside so each cube has direct contact with the hot metal. Turn them once, after about eight minutes. They should come out deep gold on two sides and still soft inside.

If you want the very best texture, fry the halloumi separately in a dry non-stick pan over medium-high heat for two minutes a side and scatter it over at the end. It takes an extra pan but delivers a crisper shell. For a weeknight, the tin method is perfectly good.

Finishing Touches and Clever Swaps

As soon as the tin comes out, squeeze over the juice of half a lemon and scatter generously with chopped parsley and mint. The acid cuts through the salty cheese and wakes up the sweetness of the roots.

Serve with warm flatbreads and a bowl of thick yoghurt stirred with crushed garlic and a pinch of salt, or spoon it over couscous, bulgur wheat or buttered puy lentils. A drizzle of pomegranate molasses, a handful of toasted pumpkin seeds or some quick-pickled red onion all lift it further.

For swaps, try swede, celeriac or wedges of red cabbage alongside the carrots — all roast in similar time. In summer, courgette and red pepper work at a slightly shorter 25 minutes.

Leftovers keep for three days in the fridge. Chop them small and fold into a frittata, blitz with stock for a warmly spiced soup, or stuff into a wrap with harissa yoghurt for the best lunch of your week.