In a large, heavy-bottomed pot, heat the olive oil over medium flame. Once hot, add the finely chopped onion, diced carrots, and diced celery. Sauté these aromatic vegetables for about 5-7 minutes, stirring occasionally, until they become tender and fragrant.
Next, incorporate the minced garlic into the pot and sauté for an additional minute, allowing the garlic to release its robust aroma.
Add the rinsed lentils to the pot, then pour in the rich vegetable broth. Sprinkle in the dried thyme, drop in the bay leaf, and add the smoked paprika. Season generously with salt and pepper to enhance the flavors. Stir well to combine all ingredients, then bring the mixture to a rolling boil.
Once boiling, reduce the heat to low. Cover the pot with a lid and let it simmer gently for about 30 minutes, or until the lentils are tender but not mushy. Stir occasionally to prevent any sticking at the bottom.
If using kale, add it to the pot in the last 10 minutes of cooking. This will give the kale just enough time to wilt and integrate its vibrant flavor into the soup.
Before serving, carefully remove the bay leaf and taste the soup; adjust the seasoning with additional salt and pepper if needed.
Serve the soup hot in bowls, elegantly garnished with fresh thyme sprigs for a touch of nature’s beauty and additional aroma.
Notes
Pair this soup with crusty whole-grain bread for a heartwarming meal.