Warm Puy lentils and roasted beetroot make a salad with enough substance for a proper lunch, yet plenty of freshness from parsley, rocket and a sharp mustard dressing. The lentils stay pleasantly firm, while the beetroot becomes tender and sweet around its edges. A little celery adds crunch, so each forkful has more than one texture.
This version puts the lentils at the centre of the plate, with no cheese needed to bring everything together. You dress them while they are warm, then fold in the roasted vegetables and finish with fresh leaves. It is a useful recipe for an unhurried supper, and the components can also be prepared ahead for another day.
What makes this warm salad work
Puy lentils are small green lentils that hold their shape well when cooked gently. That makes them particularly useful here: you want separate lentils that take up the dressing without turning the bowl into a mash. Roasted beetroot supplies a softer contrast, and its earthy sweetness benefits from a generous splash of vinegar.
The timing is straightforward. Put the beetroot in the oven first, then cook the lentils while it roasts. Make the dressing and chop the fresh ingredients during the quieter moments. Bring everything together once the beetroot is tender and the lentils have stopped steaming heavily. Warm is the aim; piping hot ingredients would wilt the leaves too quickly.
Ingredients
Serves 4 as a light main meal or 6 as a side. Allow about 20 minutes for preparation and 40–50 minutes for cooking, with the lentils cooking alongside the beetroot.
For the salad
- 600g raw beetroot, trimmed, peeled and cut into roughly 2cm wedges or chunks
- 1 large red onion, peeled and cut into thick wedges
- 1 tablespoon olive oil
- 200g dried Puy lentils
- 1 bay leaf
- 1 small garlic clove, peeled and lightly crushed
- 2 celery sticks, finely sliced
- 25g flat-leaf parsley, leaves and tender stalks chopped
- 60g rocket, washed and dried
- 30g pumpkin seeds
- Salt and freshly ground black pepper, to taste
For the mustard dressing
- 2 tablespoons extra virgin olive oil
- 2 tablespoons red wine vinegar
- 2 teaspoons Dijon mustard
- 1 teaspoon runny honey or maple syrup
- 1 tablespoon water, plus a little extra if needed
Choose beetroot of a similar size where possible, or simply cut larger roots into smaller pieces. If your lentils come with specific cooking instructions, use those as a guide and start checking them before the suggested time is up.
How to make it
- Heat the oven and prepare the vegetables. Set the oven to 200°C, or 180°C fan. Put the beetroot and red onion on a large roasting tray. Add the tablespoon of olive oil, a small pinch of salt and some black pepper. Toss well and spread into a single layer, using a second tray if everything looks crowded.
- Roast until tender. Cook for 40–50 minutes, turning the vegetables after about 25 minutes. The beetroot is ready when a small knife slides through its centre without much resistance. Check the onion when you turn the vegetables; if it is already soft and browned, lift it onto a plate and return it when assembling.
- Cook the lentils. Meanwhile, check the lentils for any small stones or debris, then rinse in a sieve. Put them in a saucepan with the bay leaf and crushed garlic. Cover generously with cold water, bring to the boil, then reduce to a gentle simmer. Cook for about 20–25 minutes, or until tender with a little bite, adding water if needed to keep them submerged.
- Mix the dressing. Whisk the extra virgin olive oil, vinegar, mustard, honey or maple syrup and tablespoon of water in a large mixing bowl. Taste and add black pepper and a little salt if needed. The dressing should taste fairly sharp, as the beetroot will soften its acidity.
- Drain and dress. Drain the cooked lentils thoroughly and discard the bay leaf and garlic. Let excess steam escape for a minute or two, then tip the warm lentils into the dressing. Stir gently and leave for about 5 minutes while you finish preparing the remaining ingredients.
- Toast the seeds. Put the pumpkin seeds in a dry frying pan over a medium heat. Stir for 2–3 minutes until fragrant and beginning to pop, then immediately transfer them to a plate. Watch closely, as they can catch quickly.
- Assemble and serve. Fold the roasted beetroot, onion, celery and most of the parsley into the lentils. Taste a spoonful containing both lentils and beetroot, then adjust the seasoning. Divide the rocket between plates, spoon the warm salad over it and finish with the pumpkin seeds and remaining parsley.
Small details that improve the result
Keep the lentils at a gentle simmer
A vigorous boil can break the skins before the centres are tender. Look for occasional small bubbles rather than a rolling pan, and taste a few lentils towards the end of cooking. Drain them once they are pleasantly tender. They should keep their shape, but should not feel chalky when you bite into them.
Give the beetroot room to roast
Overlapping pieces trap moisture and cook unevenly. A roomy tray allows the surfaces to dry a little and develop browned edges. Beetroot can stain chopping boards and hands, so use a board that cleans easily and rinse utensils promptly. Peeling before roasting also means the finished pieces can go straight into the salad.
Adjust the dressing after mixing
Lentils absorb some dressing as they stand. If the finished salad seems dry, stir in a spoonful of water before adding more oil. If it tastes flat, a small extra splash of vinegar may be all it needs. Add this gradually, tasting each time, rather than pouring in another full measure.
Serving ideas
Serve in shallow bowls while the lentils and beetroot are still warm. Wholemeal bread is useful alongside for catching the mustard dressing, particularly if you are serving the salad as a main meal. For a larger spread, it sits comfortably beside a simple roast chicken or baked fish without needing an extra sauce.
If you prefer more fresh crunch, add a few thin slices of radish just before serving. Keep the rocket underneath or fold it through at the very last moment, so it retains some lift. The pumpkin seeds are best scattered over individual portions rather than stirred through the whole bowl.
Simple variations
- Use another firm lentil: whole green or brown lentils work well. Follow their packet guidance and check the texture regularly. Split red lentils soften too much for this particular salad.
- Change the herbs: replace half the parsley with dill for a different fresh finish. Add it after the hot ingredients have cooled slightly.
- Make it vegan: choose maple syrup for the dressing and check the mustard ingredients if necessary.
- Use cooked beetroot: choose plain, unpickled beetroot, cut it into wedges and roast with the onion until heated through and beginning to colour. Start checking earlier than you would with raw beetroot.
Preparing ahead and storing leftovers
You can roast the beetroot and cook the lentils ahead, keeping the leaves, herbs and seeds separate. Cool the cooked components promptly, refrigerate within two hours and use within two days. Store in covered containers and keep the rocket dry so it stays crisp.
Eat the prepared lentils and beetroot cold, or reheat the portion you need until steaming hot throughout, then let it settle briefly before adding the fresh ingredients. Reheat only once. If taking a portion out for lunch, keep it chilled with an ice pack until you are ready to eat, and add the seeds just before serving.
