Smoked Trout and Lentil Salad
Flaky smoked trout piled over lemon-and-dijon-dressed lentils tossed with thinly sliced fennel, crisp radishes, peppery arugula, and plenty of fresh dill.
Why You'll Love This Recipe
This is a cool, composed salad for anyone who wants a lunch that eats like a real meal but doesn't leave them sluggish. Smoked trout brings a rich, savory backbone, and the bed of lentils turns what could be a light plate into something filling and sustaining. It comes together without turning on the oven, which makes it a good midday option when you want something substantial but not heavy.
Lentils take a dressing best while they are still warm. Warm lentils act like little sponges, drawing the dijon, lemon, and dill into their centers rather than letting it all slide off the way it would on cold, firm legumes. That single step is the difference between seasoned lentils and bland ones. The fennel and radish, sliced thin and folded in at the end, stay crisp and cool against the tender lentils, while the arugula and lemon keep the whole bowl bright and cut the richness of the smoked fish.
Protein from the trout and lentils, fiber from the lentils and vegetables, and the kind of fat that makes a dish taste finished. The trout is a source of omega-3 fats, the lentils bring plant protein and fiber that helps you feel full, and the raw fennel, radish, and arugula add volume, crunch, and freshness for very little on the plate. It is the sort of lunch that holds you until dinner without weighing you down.
Ingredients
- about 480g cooked or smoked trout, flaked
- 3 1/2 cups cooked lentils
- 1 fennel bulb, thinly sliced
- 6 radishes, thinly sliced
- 4 cups arugula
- 1 tbsp dijon mustard
- 3 tbsp olive oil
- 2 tbsp lemon juice
- 3 tbsp chopped dill
- 1/2 tsp salt
Instructions
- Cook the lentils: Rinse the lentils under cold water, picking out any stray grit or shriveled ones. Simmer them gently in a pot of unsalted water until tender but still holding their shape, about 20 to 25 minutes for green or brown lentils. Drain well in a sieve and set aside; a few minutes of cooling is fine, but they take on the dressing best while still slightly warm.
- Flake the trout: Peel away any skin from the trout and break the flesh into bite-size flakes with your fingers or a fork, running your fingertips through as you go to find and remove any small pin bones. Set aside.
- Prep the vegetables and dill: Trim the stalks and root end from the fennel bulb, halve it, and slice it as thinly as you can, ideally on a mandoline. Trim the radishes and slice them thin as well. Roughly chop the dill.
- Make the dressing: In a large bowl, whisk together the dijon mustard, olive oil, lemon juice, chopped dill, and salt until the mixture looks smooth and slightly thickened. The mustard is what holds the oil and the lemon together, and a dressing that has split runs straight to the bottom of the bowl.
- Dress the lentils: Add the drained lentils to the bowl and toss until evenly coated, then let them sit for a couple of minutes on their own before anything else goes in, since warm lentils take up a dressing and this is the only chance they get at it.
- Fold in the crunch: Add the sliced fennel, radishes, and arugula and fold everything together gently, just until the greens are lightly coated and combined; the arugula will wilt if you overwork it.
- Plate and top: Divide the lentil salad among plates and arrange the flaked trout over the top rather than folding it through, since smoked trout is soft enough to break into shreds the moment a spoon goes near it. Serve right away, with an extra squeeze of lemon if you like.
Variations
- Different smoked fish: Swap the trout for hot-smoked salmon or smoked mackerel. Both flake the same way and carry the dressing well; mackerel is richer and stronger, so use a bit less.
- Creamy and tangy: Crumble goat cheese or feta over the top with the fish for a soft, salty contrast to the lentils. This adds dairy.
- Heartier grain bowl: Stretch the base by folding in cooked farro or pearl barley alongside the lentils for a chewier, more filling bowl. This adds gluten.
- Toasted crunch: Sprinkle chopped toasted walnuts or hazelnuts over the finished salad for extra texture and a nutty note against the dill. This adds nuts.
- Brighter and briny: Stir a spoonful of drained capers into the dressing and swap the arugula for watercress or baby spinach for a sharper, more peppery bite.
Storage & Leftovers
Stored in an airtight container in the refrigerator, the dressed lentil base keeps well for about three days. For the best texture, keep the flaked trout and the arugula separate and add them when you serve, since the greens wilt and the fish is best not tossed around repeatedly.
This dish is meant to be eaten cold or at cool room temperature, so there is no reheating step. If it has been in the fridge and tastes flat, let it sit out for ten minutes and wake it back up with a fresh squeeze of lemon and a pinch of dill; cold dulls both acid and salt, so a small refresh brings it back to life.
To get ahead, cook and dress the lentils and slice the fennel and radishes up to a day in advance and store them covered in the fridge. When you are ready to eat, all that is left is folding in the arugula and topping with the trout, which turns this into a five-minute assembly.
Notes & Tips
- Choose lentils that hold up: Green, brown, or French-style Puy lentils keep their shape and give the salad structure. Skip red or yellow lentils, which cook down soft and turn the base mushy.
- Crisp the fennel and radish: If your fennel and radishes have been sitting in the fridge, drop the slices into a bowl of ice water for ten minutes and pat them dry before adding. They come back crisp and taste cleaner.
- Taste before you salt: Smoked trout is already salty, and how salty varies a lot by brand. Whisk and taste the dressing first, then hold back on the added salt until you have folded everything together and tasted the whole bowl.
- Save the fennel fronds: The feathery green fronds on top of the fennel bulb are edible and taste like a milder version of the dill. Chop a few and add them with the herbs, or use them to garnish the plate.
- Buy hot-smoked for easy flaking: Hot-smoked trout is fully cooked and pulls apart into tender flakes, which is what you want here. Cold-smoked trout is silkier and sliceable, more like smoked salmon, and will sit on top rather than flake in.
- Round it into a bigger meal: A slice of crusty bread or a few boiled baby potatoes on the side turns this from a light lunch into a full dinner without changing the character of the dish.
Nutrition & Mindful Eating
- Lentils, trout and the raw vegetables each do a different job. The lentils give the bowl its base and its body, the trout brings salt and smoke, and the fennel, radish and arugula keep the whole thing crisp and awake from the first forkful.
- Lentils hold their shape when they are cooked just to tender, so each one stays separate and slightly firm under the fork. They carry plant protein and folate inside that firmness, which is why a bowl of them eats like lunch rather than like a side.
- Smoked trout flakes apart in warm coppery pieces and seasons everything it touches. The fat in the fish is where its omega-3s sit, and it is also what makes those flakes taste round and full against so much acid.
- Fennel shaved thin tastes faintly of anise and stays crunchy, radish snaps and turns peppery at the finish, and arugula runs a green bitterness underneath. Left raw, all three keep their water and their bite.
- Dijon mustard, lemon and olive oil are whisked into a dressing sharp enough to stand up to smoked fish. The mustard is what holds the oil and the lemon together, and dill stirred in at the last minute keeps the bowl smelling like a garden.
- As you eat, pay attention to the way the crunch of the radish and fennel lands against the soft lentils, and let the meal take the whole of your lunch break rather than the first five minutes of it.
Frequently Asked Questions
Can I use canned or pouched lentils instead of cooking them from dry?
Yes. Drain and rinse them well, and if they seem soft, be gentle when tossing so they do not break down. Cooking from dry gives you firmer lentils and more control over doneness, but pre-cooked ones make this a very fast assembly.
Should the trout be warm or cold?
Cold or cool room temperature is ideal here. This is a chilled salad, and warm fish would wilt the arugula and soften the crisp vegetables. Just flake it straight from the package over the dressed lentils.
My fennel tastes too strong and licorice-like. What can I do?
Slice it as thinly as possible, which mellows it, and soak the slices in ice water for a few minutes before adding. You can also use a little less and lean on the radish and arugula for crunch instead.
It came out a little dry the next day. How do I fix that?
Lentils keep drinking up dressing as they sit, so leftovers can taste dry. Refresh the bowl with a drizzle of olive oil and a squeeze of lemon, toss, and taste for salt before serving.