Lentil Soup · Lemony Vegetable
Lemony Vegetable Lentil Soup
Brown lentils, carrots, celery and tomatoes simmered with cumin and smoked paprika, finished with spinach and a squeeze of lemon. Cheap, hearty and freezer-friendly.
- Prep
- 15 min
- Cook
- 45 min
- Total
- 1 hr
- Serves
- 6
- Level
- Easy
Ingredients
- 2 tbsp olive oil
Swaps for olive oil
Instead of olive oil
- Avocado oil or another neutral oil: The same amount. No olive flavor; avocado oil handles higher heat.
- Butter: The same amount. Richer and nutty when browned.
- A neutral oil + more seasoning: The same amount. Dressings lose the fruity, peppery note; a little extra lemon, garlic or mustard makes up for it.
- 1 medium onion, chopped
Swaps for onion
Instead of onion
- Another onion: The same amount. Yellow is the all-rounder; white is sharper and crisper; red is milder raw and adds color; sweet onions are mildest.
- Shallots: The same amount, chopped. Milder and sweeter, with a hint of garlic.
- Leeks: About 1½ times as much, white and light green parts. Milder and softer when cooked.
- 2 carrots, diced
- 2 celery ribs, diced
- 3 cloves garlic, minced
Swaps for garlic
Instead of garlic
- Garlic powder: ⅛ tsp for each clove. Mellower and sweeter, with no bite.
- Jarred minced garlic: ½ tsp for each clove. Milder and slightly sour from the preserving liquid.
- 1 tsp ground cumin
Swaps for ground cumin
Instead of cumin
- Ground coriander: The same amount. Brighter and citrusy, less earthy.
- Chili powder: Twice as much. Contains cumin, plus chile heat and garlic.
- Caraway seeds, ground: Half as much. A related flavor, a bit sharper.
- ½ tsp smoked paprika
Swaps for smoked paprika
Instead of paprika
- Sweet paprika + a pinch of chipotle or cumin: The same amount of paprika, plus a pinch. Some smokiness without the full smoked flavor; chipotle adds heat.
- Chipotle powder: About ¼ the amount. Smoky and much hotter.
- ½ tsp dried thyme
Swaps for dried thyme
Instead of thyme
- Fresh thyme: 1 tbsp chopped fresh for each 1 tsp dried (three times as much). Brighter and more lemony.
- Italian seasoning or dried marjoram: The same amount. Close; Italian seasoning adds oregano and basil.
- 2 tbsp tomato paste
Swaps for tomato paste
Instead of tomato paste
- Tomato sauce or passata: 3 tbsp for each 1 tbsp paste. Lighter, fresher tomato flavor.
- Ketchup: The same amount. Sweeter and vinegary; fine for a tablespoon or two.
- 1 ½ cups brown lentils, or green lentils, picked over and rinsed ≈ 288 g
- 1 can diced tomatoes, 14.5 oz
Swaps for diced tomatoes
Instead of canned tomatoes
- Whole peeled tomatoes, chopped: The same amount. Softer pieces that break down more: canned diced tomatoes have calcium chloride to keep their shape.
- 7 cups vegetable broth
Swaps for vegetable broth
Instead of broth
- Chicken broth: The same amount. Richer and more savory; not vegetarian.
- Bouillon cube, powder or paste + water: Follow the label for the amount of liquid. Close in flavor; a little saltier.
- Water + extra seasoning: The same amount, with ½ tsp salt per cup and extra garlic, onion or herbs. Flatter and lighter, but fine where other ingredients bring plenty of flavor.
- 1 bay leaf
- 1 tsp kosher salt
Swaps for kosher salt
Instead of salt
- Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
- Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.
- ½ tsp black pepper
- 3 cups baby spinach ≈ 90 g
- 2 tbsp lemon juice
Swaps for lemon juice
Instead of lemon juice
- Lime juice: The same amount. A different, more floral aroma; works almost everywhere.
- Bottled lemon juice: The same amount. More sour and flatter; fine in cooking and baking, less bright in dressings and drinks.
- White wine vinegar or white vinegar: Half as much. Sharper, with no citrus aroma.
- 2 tbsp fresh parsley, chopped
Swaps for fresh parsley
Instead of parsley
- Dried parsley: 1 tsp dried for each 1 tbsp chopped fresh (a third as much). Very mild; it adds color more than flavor.
- Cilantro: The same amount. Stronger and citrusy; suits Mexican and Asian dishes.
- Celery leaves or chervil: The same amount. Celery leaves are peppery and grassy; chervil is mild with a hint of anise.
Cooking for a crowd? Pans, timing and salt for 12 to 50.
Missing something? Tap Swaps next to an ingredient, or see all substitutions.
Steps
- Spread the lentils on a plate and pick out any small stones, then rinse them in a fine-mesh strainer.
- Heat the oil in a Dutch oven over medium heat. Add the onion, carrots and celery and cook until softened.⏱ Soften vegetables: 8 min
- Add the garlic, cumin, smoked paprika, thyme and tomato paste and stir until fragrant.⏱ Spices: 1 min
- Add the lentils, tomatoes, broth, bay leaf, salt and pepper and bring to a.
boil (how to boil)
Boil Heat liquid until big bubbles rise and break all over the surface. 1. Use a pot big enough that the water fills it no more than three quarters.2. Cover it to boil faster, over high heat.3. Salt pasta or vegetable water once it boils.4. Add the food, stir, and bring it back to a boil before you start timing. Done when: A rolling boil keeps bubbling hard even when you stir. Safety: Turn pot handles toward the back of the stove, and drain pasta into a colander in the sink, pouring away from you. Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to boil water for pasta and vegetables: mistakes to avoid - Lower the heat and⏱ Simmer: 30 min, partly covered, until the lentils are tender.
simmer (how to simmer)
Simmer Cook liquid just below a boil, with small bubbles breaking the surface now and then. 1. Bring the liquid up over medium-high heat.2. As soon as bubbles rise steadily, turn the heat down.3. Adjust until only a few small bubbles break the surface every second or two.4. Stir now and then and check that it hasn't crept back to a boil. Done when: You see lazy, small bubbles, not a rolling boil. A "bare" simmer has just a bubble here and there. Safety: Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to simmer: mistakes to avoid - Remove the bay leaf. For a thicker soup, pulse an immersion blender in the pot 3 or 4 times.
- Stir in the spinach until wilted.⏱ Spinach: 1 min
- Stir in the lemon juice and parsley. Taste and add more salt if needed.
Tap an underlined word for how to do it, or see all techniques.
Tips
- Red lentils fall apart and make a different, smoother soup. Use brown or green lentils here.
- Most broths are gluten-free, but some contain wheat. Check the label if that matters to you.
Storage
Refrigerate up to 4 days or freeze up to 3 months. Thin with water when reheating.
Cook once, eat twice: Double it (12 servings instead of 6), eat half and freeze the other half. It keeps 3 months frozen, by the storage note above. Print a freezer label · More freezer meals
How long leftovers keep, and freezing and reheating: leftovers and storage. In season: lemons (December to April), spinach (March to May and September to November).
Quick answers
- Can I freeze it?
Yes. Refrigerate up to 4 days or freeze up to 3 months.
Answered from this recipe's own storage, make-ahead and swap notes.
Estimated nutrition per serving
- Calories
- 260 1,090 kJ
- Protein
- 14 g
- Carbohydrates
- 42 g
- Fiber
- 8 g
- Sugars
- 7 g
- Fat
- 6 g
- Saturated fat
- 1 g
- Sodium
- 1,180 mg
Whole recipe, 6 servings: about 1,590 calories.
Estimate from USDA FoodData Central; not medical or dietary advice. Based on 18 of 18 ingredients.
How we estimate
We add up USDA FoodData Central values for each measured ingredient as written and divide by the recipe's 6 servings, so changing the servings or units here doesn't change a serving. Brands, swaps, trimming and cooking all change the real numbers.
Estimated cost
About $1.80 a serving
About $10.75 for the recipe as written (6 servings).
Estimate; prices vary by store and region. U.S. average prices for September 2026 from BLS Average Price Data and USDA ERS Purchase to Plate prices updated with the BLS Consumer Price Index. Priced: 11 of 17 ingredients, 98% by weight.
How we estimate
Each measured ingredient is weighed as in the nutrition estimate and priced at the U.S. average: BLS's average price where BLS publishes one, else USDA ERS's Purchase to Plate price for 2017-18 raised to September 2026 with the CPI for that food group. Whole packages, store brands, sales and regions all change the real cost: treat it as a ballpark.
- vegetable broth $5.25 ERS
- diced tomatoes $1.35 ERS
- baby spinach $1.10 ERS
- brown lentils $1.05 BLS
- carrots $0.45 ERS
- olive oil $0.40 ERS
- onion $0.35 ERS
- celery ribs $0.35 ERS
- lemon juice $0.15 ERS
- garlic $0.10 ERS
- fresh parsley $0.10 ERS
Not priced (no official average price we can match, so not in the total): ground cumin, smoked paprika, dried thyme, tomato paste, kosher salt, black pepper.
More dishes for less: cheap eats.
Goes well with
Picked by our pairing rules: the same kind of kitchen, room in the oven and on the stove, ready in time, and a balance of starch, vegetables and richness.
- Side Cheesy Garlic Bread 30 min Uses the oven while the lentil soup is on the stove. Ready in 30 min, inside the main's 1 hr. Bread for dunking.
- Side Classic Greek Village Salad 15 min No cooking: make it while the main cooks. Ready in 15 min, inside the main's 1 hr. A crisp salad next to a bowl of lentil soup.
- Dessert Silky Homemade Chocolate Pudding 2 hr 15 min Something rich after a light main. Make it ahead, so it's ready when dinner is.
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Cleanup score 4/5 (easy cleanup): 2 things to wash, Dutch oven, strainer. More one-pot recipes.
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