Name: Lemon and Cucumber Lentil Soup
Prep time: 15 min
Cook time: 30 min
Total time: 50 min
Yield: 6
Cuisine: Mediterranean-Inspired
Ingredients: 2 tablespoons olive oil; 1 medium onion, finely chopped; 2 garlic cloves, minced; 1 medium carrot, diced (optional for sweetness); 1 teaspoon ground cumin (optional for gentle warmth); 1½ cups (300g) red lentils, rinsed well; 6 cups (1.4 liters) vegetable broth; 2 medium cucumbers, peeled, seeded, and finely diced (about 2½ cups); Zest and juice of 2 large lemons (about ⅓ cup juice); 1 teaspoon salt, or to taste; ½ teaspoon black pepper; ¼ cup chopped fresh dill or parsley; Extra lemon slices and fresh herbs for garnish

This refreshing Lemon and Cucumber Lentil Soup blends tender lentils with crisp cucumber and bright, zesty lemon for a light yet satisfying bowl. Naturally creamy from the lentils, it offers a vibrant, herbaceous flavor with cooling cucumber notes—perfect as a wholesome lunch or gentle dinner that feels both nourishing and invigorating.

Why You’ll Love This Recipe

This Lemon and Cucumber Lentil Soup is a delightful twist on classic lentil soup—bright, fresh, and incredibly light while still being filling and comforting. The fresh lemon brings a sunny tang that wakes up every spoonful, while cool cucumber adds a refreshing crunch and subtle garden sweetness.

It’s quick to make in one pot, packed with plant-based protein and fiber, naturally gluten-free and vegan, and ideal for warmer days or when you want something uplifting yet cozy. The whole family will enjoy its clean, vibrant taste, and it feels like a nourishing reset in a bowl.

Yield: 6 servings

Lemon and Cucumber Lentil Soup

Bright, refreshing lentil soup with zesty lemon and cooling cucumber.

Prep Time 15 minutes

Cook Time 30 minutes

Additional Time 5 minutes

Total Time 50 minutes

Ingredients

2 tablespoons olive oil
1 medium onion, finely chopped
2 garlic cloves, minced
1 medium carrot, diced (optional for sweetness)
1 teaspoon ground cumin (optional for gentle warmth)
1½ cups (300g) red lentils, rinsed well
6 cups (1.4 liters) vegetable broth
2 medium cucumbers, peeled, seeded, and finely diced (about 2½ cups)
Zest and juice of 2 large lemons (about ⅓ cup juice)
1 teaspoon salt, or to taste
½ teaspoon black pepper
¼ cup chopped fresh dill or parsley
Extra lemon slices and fresh herbs for garnish

Instructions

Build the aromatic base – Heat the olive oil in a large pot over medium heat. Add the chopped onion and diced carrot. Sauté gently for 5–6 minutes until the onion becomes soft and sweetly fragrant.
Add garlic and spice – Stir in the minced garlic and ground cumin. Cook for 1 minute until beautifully aromatic, filling your kitchen with warmth.
Introduce the lentils – Add the well-rinsed red lentils and stir them into the vegetables so they soak up all the lovely flavors.
Pour in the broth – Add the vegetable broth, salt, and black pepper. Stir everything together and bring the mixture to a gentle boil.
Simmer the lentils – Reduce heat to low, partially cover the pot, and let the soup simmer for about 20 minutes until the lentils are soft and starting to break down slightly.
Add the cucumber – Stir in most of the finely diced cucumber (reserve a small handful for garnish). Continue simmering for another 5–7 minutes so the cucumber softens just enough while keeping a touch of freshness.
Brighten with lemon – Remove the pot from the heat. Stir in the lemon zest and fresh lemon juice along with the chopped fresh dill or parsley. The soup will instantly smell bright and inviting.
Adjust consistency and seasoning – Taste and add more salt, pepper, or a splash of extra broth if you prefer a thinner soup. The lemon should make all the flavors sing.
Final fresh touch – Stir in the reserved diced cucumber for little pops of cool crunch right before serving.
Serve with joy – Ladle the warm soup into bowls. Garnish with extra lemon slices, fresh herbs, and a light drizzle of olive oil if desired. Enjoy with warm flatbread or a simple green salad for a light, refreshing meal.

Notes

Add the lemon juice after removing from heat to preserve its fresh, vibrant taste. Red lentils create a naturally light creaminess. This soup is best enjoyed fresh but reheats well with an extra squeeze of lemon.

Nutrition Information

Yield

Serving Size

1
Amount Per Serving Calories 158Total Fat 6gSaturated Fat 1gUnsaturated Fat 5gSodium 1288mgCarbohydrates 21gFiber 6gSugar 5gProtein 7g

The recipes and nutritional information on Yum Tonight are for informational purposes only. Always consult a healthcare provider for personalized dietary advice.

Recipe Tips and Tricks

Rinse lentils thoroughly until the water runs clear to ensure they cook evenly and taste clean. Dice the cucumber finely so it softens gently during simmering without becoming mushy, while still adding refreshing texture.

Use fresh lemon juice added at the end for maximum brightness—never boil it or the flavor will turn bitter. Simmer gently to keep the soup light and brothy rather than thick. For extra freshness, reserve some diced cucumber and lemon zest to stir in just before serving. Taste and adjust seasoning after adding lemon, as acidity can change the balance.

Ingredients Notes

Red lentils work beautifully here because they cook quickly and break down slightly to give a naturally creamy body without heaviness. Fresh cucumbers (English or Persian preferred) bring crisp, cooling moisture and mild sweetness that pairs perfectly with lemon.

Plenty of fresh lemon juice and zest deliver bright citrus notes that lift the entire soup. Onion, garlic, and a touch of carrots build a savory aromatic base, while vegetable broth keeps it light and fully plant-based.

Fresh herbs like dill or parsley enhance the fresh, garden-like character, and a hint of cumin or turmeric adds gentle warmth without overpowering the delicate flavors.

Variations and Substitutions

For a creamier version, stir in a splash of coconut milk or blend a portion of the soup. Add chopped spinach, kale, or fresh mint for extra greens and herbal brightness. Make it spicier with a pinch of red pepper flakes or ground cumin.

Swap red lentils for green lentils if you prefer more texture, though they will need a few extra minutes of cooking. Use lime instead of lemon for a slightly different citrus twist, or add chopped celery for more crunch.

For a heartier meal, include cooked quinoa or chickpeas. Turn it into a chilled summer soup by cooling completely and serving cold with extra diced cucumber and yogurt drizzle (if not keeping vegan).

Storage Options

This soup stores well and the flavors continue to meld nicely. Cool completely before transferring to airtight containers. It will keep in the refrigerator for up to 4 days. For longer storage, freeze in portion-sized containers for up to 2 months.

Thaw overnight in the fridge and reheat gently on the stovetop, adding a splash of water or broth to loosen if needed. Stir in a bit of fresh lemon juice after reheating to revive the bright flavor. Note that cucumber may soften further upon reheating, so add extra fresh diced cucumber when serving leftovers for best texture.