Heat oil in a large pot over medium heat. Add onion, celery, and carrots and cook them until they’re soft, fragrant, and translucent. Add potato and sauté for a few minutes, then add garlic and spices. Sauté then add salt, lentils and water.
Simmer, stirring occasionally, until lentils become soft, about 15-20 minutes. Add lemon juice and vinegar, taste and adjust seasoning, add more salt if required. Serve with biscuits and top with fresh cilantro.