01 - Heat olive oil in a large pot over medium heat. Add the onion, carrots, and celery. Sauté for 5-7 minutes until the vegetables are softened and the onion is translucent.
02 - Stir in the minced garlic, ground cumin, smoked paprika, and ground coriander. Cook for 1 minute, stirring constantly, until fragrant.
03 - Add the rinsed lentils, drained diced tomatoes, vegetable broth, bay leaf, black pepper, and salt. Stir well and bring to a rolling boil over medium-high heat.
04 - Reduce heat to low and simmer uncovered for 35-40 minutes, stirring occasionally, until the lentils are tender and the flavors have melded.
05 - Remove and discard the bay leaf. Stir in the fresh lemon juice and adjust salt and pepper to taste.
06 - For a creamier consistency, partially blend the soup using an immersion blender, leaving some lentils whole for texture.
07 - Ladle into bowls and serve hot, garnished with freshly chopped parsley. Optionally drizzle with olive oil.