Warm & Soften : Heat 1 tablespoon olive oil in a Dutch oven over medium heat. Add onion, carrots, and celery with a pinch of salt and pepper. Cook, stirring, until the onion turns translucent and the vegetables soften slightly, 6 to 7 minutes. If the pot looks dry, add a splash of water instead of more oil.
Toast & Bloom : Stir in tomato paste and garlic; cook until the paste deepens in color, 1 minute. Sprinkle in cumin, oregano, coriander, smoked paprika, and add the bay leaf. Toast the spices until aromatic, 60 to 90 seconds.
Deglaze : Pour in a small splash of broth and scrape up any browned bits.
Simmer to Tender : Add the remaining broth, diced tomatoes, and lentils. Bring to a simmer, then reduce heat to low and partially cover. Cook, stirring once or twice, until the lentils are tender but still hold their shape, 22 to 25 minutes.
Spot-Blend for Body : Remove the bay leaf. Using an immersion blender, blend in one corner of the pot for 5 to 10 seconds to slightly thicken while keeping most lentils intact.
Green Finish : Stir in the kale and simmer until just wilted and bright, 2 to 3 minutes. Off the heat, add lemon juice. Taste and season with black pepper and a small additional pinch of salt only if needed.
Serve : Ladle about 1½ cups into bowls. Drizzle the remaining 2 tablespoons olive oil evenly over portions, then finish with parsley and a tiny pinch of Aleppo pepper, if using. Serve with lemon wedges.