Why Root Vegetables Shine in Autumn

By October, the best of the British allotment has gone underground. While tomatoes sulk and courgettes give up, carrots, parsnips, squash and potatoes are hitting their stride. Roots dug after a cold snap taste sweeter, because the plants convert stored starch into sugar to protect themselves from frost — which is why a parsnip pulled in November tastes nothing like one lifted in September.

They are also forgiving in a way that summer vegetables are not. Roots keep for weeks in a cool, dark cupboard, they roast, mash, soup and stew with equal grace, and they cost very little. For chilly evenings and slow weekend cooking, there is no better larder.

Choosing and Storing Your Roots

Buy loose where you can, so you can judge each one. A few practical rules:

• Carrots: firm, bright and unblemished, with no bend when you snap one. Twist off the leafy tops as soon as you get home — they draw moisture from the root and shorten its life considerably.
• Parsnips: smaller ones (roughly 150–200g each) are sweeter and less woody than the huge prize-winners. Avoid any with soft, brown patches at the crown.
• Squash: choose one that feels heavy for its size, with a dry, intact stalk. A whole Crown Prince or butternut will sit happily in a cool room for a month or more.
• Potatoes: floury varieties such as King Edward or Maris Piper for roasting and mashing; waxy ones such as Charlotte for trays where you want them to hold their shape.

Keep roots unwashed in a dark, cool place — a garage, a shed or the bottom of a cupboard — and never in the fridge alongside apples or onions, which speed up sprouting. Once cut, squash should be wrapped and used within four days.

Slow-Roasted Roots with Honey and Thyme

This is the recipe to reach for on a Sunday afternoon when the light is going and the oven is on anyway.

Heat the oven to 200°C (180°C fan, gas mark 6). Peel 500g carrots and 500g parsnips, cut them into batons about the thickness of your thumb, and tumble them into a large roasting tin with 3 tablespoons of olive oil, a good pinch of salt and plenty of black pepper. Roast for 35 minutes.

Meanwhile, quarter a small squash, scoop out the seeds — no need to peel — and cut it into wedges. After the first 35 minutes, add the squash to the tin along with 6 unpeeled garlic cloves and a handful of thyme sprigs. Roast for another 25 minutes, then drizzle over 2 tablespoons of runny honey and return to the oven for a final 10 minutes, until the edges are dark and sticky.

Serve straight from the tin with sausages, a roast chicken, or simply a bowl of buttered lentils. Leftovers are excellent chopped into a salad the next day with a sharp mustard dressing.

A Velvety Squash and Carrot Soup

Frost sweetens squash, so this is the moment to make it. Soften a chopped onion in a large pan with a knob of butter and a pinch of salt for 8 minutes, without letting it colour. Add 3cm of grated fresh ginger, 1 teaspoon of ground coriander and a pinch of chilli flakes, and cook for a minute until fragrant.

Tip in 800g peeled, cubed squash and 300g chopped carrots, then pour over 1.2 litres of hot vegetable or chicken stock. Simmer gently for 25 minutes, until everything collapses when pressed with a spoon. Blend until completely smooth, then loosen with 100ml of double cream or coconut milk. Taste and correct the seasoning — squash needs more salt than you expect. A squeeze of lime at the end lifts the whole pan.

Parsnip and Potato Mash with Mustard

Boil 700g floury potatoes and 300g parsnips, both peeled and cut into even chunks, in well-salted water for 18–20 minutes. Drain thoroughly and leave in the colander for two minutes to steam dry.

Return to the pan with 80g butter, 100ml warm milk and 2 teaspoons of Dijon mustard, and mash until smooth. Stir through a handful of grated mature Cheddar and a little chopped parsley. The parsnip brings a nutty sweetness that makes this a proper companion to roast pork, bangers, or a slow-cooked stew.

Weekend Cooking: A Simple Root Vegetable Hotpot

For a relaxed Saturday, make a hotpot that looks after itself in the oven. Brown 600g diced lamb or, for a vegetarian version, a tin of drained butterbeans and 200g of chestnut mushrooms. Set aside.

In the same pan, soften 2 sliced onions, 3 sliced carrots and 2 sliced parsnips for 10 minutes. Return the lamb, add 2 tablespoons of plain flour, stir, then pour in 500ml of stock and a tablespoon of Worcestershire sauce. Simmer for 20 minutes.

Tip into a deep ovenproof dish and top with 700g of thinly sliced potatoes, overlapping them like roof tiles. Brush with melted butter, season well and cover with foil. Bake at 170°C (150°C fan, gas mark 3) for 90 minutes, then uncover and bake for a further 30 minutes until the top is crisp and golden. Rest for 10 minutes before serving with buttered greens or a sharp pickled red cabbage.