This Greek lentil soup is hearty, wholesome, and filled with Mediterranean-inspired flavors. Tender lentils simmer slowly with carrots, celery, onion, oregano, tomato sauce, spinach, and olives to create a comforting meal that’s both nourishing and satisfying. The bright touch of red wine vinegar gives the soup a fresh finish, making it perfect for chilly evenings or healthy meal prep throughout the week.
Why You’ll Love This Recipe
Greek lentil soup is simple to prepare and packed with flavor. The slow cooker does most of the work, allowing the ingredients to blend together into a rich and comforting soup. Lentils provide plant-based protein and fiber, while vegetables and herbs create layers of savory flavor.
You’ll also love how budget-friendly and versatile this recipe is. It’s naturally vegan, easy to customize, and stores beautifully for leftovers. Whether served as a light lunch or cozy dinner, this soup is filling without feeling heavy.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
4 cups water
4 cups vegetable broth
2 cups dried green or brown lentils, rinsed
2 medium carrots, chopped
1 small onion, chopped
1 celery rib, chopped
1 teaspoon dried oregano, divided
1 cup fresh spinach, chopped
1/2 cup tomato sauce
1 can (2-1/4 ounces) sliced ripe olives, drained
3 tablespoons red wine vinegar
2 garlic cloves, minced
1/2 teaspoon salt
1/4 teaspoon black pepper
Optional garnish: chopped red onion, chopped parsley, and lemon wedges
Directions
Add the water, vegetable broth, lentils, carrots, onion, celery, and 1/2 teaspoon oregano to a 5- or 6-quart slow cooker.
Cover and cook on low for 4 to 5 hours, or until the lentils are tender.
Stir in the spinach, tomato sauce, olives, red wine vinegar, garlic, salt, pepper, and remaining oregano.
Cover again and continue cooking on low for about 1 hour, until the spinach is wilted and the flavors are fully combined.
Stir the soup well before serving. Garnish with chopped parsley, red onion, and lemon wedges if desired.
Servings and timing
Servings: 12 servings
Prep Time: 20 minutes
Cook Time: 5 to 6 hours
Total Time: About 5 hours 20 minutes
Variations
For extra protein, stir in shredded cooked chicken during the final hour of cooking. This creates a heartier soup while still keeping the Mediterranean flavors intact.
You can also swap the spinach for kale or Swiss chard. Kale gives the soup a slightly earthy flavor, while Swiss chard adds mild sweetness.
If you prefer a creamier texture, add a spoonful of plain Greek-style yogurt to each bowl before serving. The yogurt balances the acidity of the vinegar beautifully.
To make the meal even more filling, serve the soup with cooked rice or quinoa on the side. Avoid mixing grains directly into the pot if you plan to store leftovers, as they absorb a lot of liquid.
Storage/Reheating
Allow the soup to cool completely before storing it in an airtight container in the refrigerator. It will stay fresh for up to 4 days.
Because lentils continue absorbing liquid over time, the soup may thicken in storage. Add a splash of water or broth before reheating to loosen the consistency.
To reheat, warm the soup gently on the stovetop over medium heat or microwave individual portions until heated through.
This soup also freezes very well. Transfer cooled soup into freezer-safe containers or freezer bags and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.
FAQs
Can I make this soup on the stovetop instead of a slow cooker?
Yes. Combine the base ingredients in a large pot, bring to a boil, then reduce to a simmer and cook for 30 to 45 minutes until the lentils are tender. Add the remaining ingredients and simmer a few more minutes until the spinach wilts.
What type of lentils work best?
Green and brown lentils are ideal because they hold their shape during cooking. Red lentils tend to break down and create a softer texture.
Is this soup vegan?
Yes, the soup is naturally vegan when made with vegetable broth.
Can I use fresh tomatoes instead of tomato sauce?
Yes. Blend canned or fresh tomatoes until smooth and add a small spoonful of tomato paste for extra richness.
Why is vinegar added to lentil soup?
Red wine vinegar brightens the flavor and balances the earthy taste of the lentils.
Can I freeze leftovers?
Absolutely. Greek lentil soup freezes very well for up to 3 months.
How do I thin leftover soup?
Simply stir in additional broth or water while reheating until the desired consistency is reached.
What can I serve with Greek lentil soup?
Crusty bread, roasted potatoes, rice, or a fresh salad pair wonderfully with this soup.
Can I add more vegetables?
Yes. Zucchini, bell peppers, or diced potatoes are excellent additions.
How do I make the soup spicier?
Add crushed red pepper flakes or a pinch of cayenne pepper during cooking for extra heat.
Conclusion
Greek lentil soup is a cozy and flavorful dish that transforms simple pantry ingredients into a comforting Mediterranean-inspired meal. The combination of lentils, vegetables, oregano, olives, and vinegar creates a balanced soup that feels hearty yet fresh. Whether you enjoy it for meal prep, a family dinner, or a healthy lunch, this easy slow-cooker recipe is sure to become a regular favorite in your kitchen.
This Greek Lentil Soup is a hearty and wholesome Mediterranean-inspired soup made with tender lentils, vegetables, spinach, olives, and herbs simmered together in a flavorful broth for a comforting and nourishing meal.
Ingredients
4 cups water
4 cups vegetable broth
2 cups dried green or brown lentils, rinsed
2 medium carrots, chopped
1 small onion, chopped
1 celery rib, chopped
1 teaspoon dried oregano, divided
1 cup fresh spinach, chopped
1/2 cup tomato sauce
1 can (2-1/4 ounces) sliced ripe olives, drained
3 tablespoons red wine vinegar
2 garlic cloves, minced
1/2 teaspoon salt
1/4 teaspoon black pepper
Optional garnish: chopped red onion, chopped parsley, and lemon wedges
Instructions
Add the water, vegetable broth, lentils, carrots, onion, celery, and 1/2 teaspoon oregano to a 5- or 6-quart slow cooker.
Cover and cook on low for 4 to 5 hours, until the lentils are tender.
Stir in the spinach, tomato sauce, olives, red wine vinegar, garlic, salt, black pepper, and remaining oregano.
Cover again and cook on low for another 1 hour until the spinach is wilted and the flavors are blended.
Stir well before serving.
Garnish with chopped parsley, red onion, and lemon wedges if desired.
Notes
Green or brown lentils work best because they hold their shape during cooking.
Add extra broth or water when reheating because lentils absorb liquid over time.
Kale or Swiss chard can replace spinach for a different flavor and texture.
This soup freezes very well for up to 3 months.
Serve with crusty bread, rice, or a fresh salad for a complete meal.
Add crushed red pepper flakes for extra heat if desired.
