Heat a medium saucepan over medium-high heat. Add the 1 tablespoon oil.
When the oil is hot, add the onion, carrots, celery and garlic. Sauté until the vegetables become a little soft, about 3 minutes.
Add the broth, tomato, lentils, bullion, salt, pepper and oregano.
When it starts to boil, add the cilantro and cover pot with lid. Bring to a simmer.
Cook, stirring occasionally, until the lentils are soft, about 18 minutes. Check for taste and add more salt & pepper if desired.
Serve hot. For extra flavor add a few dashes of hot sauce and a little squeezed fresh lime juice.
