Wash lentils and start to cook in water per package directions
While they cook, dice and add potato and carrots to the lentils
Cook until softened
Once the water has started evaporating and everything is soft, add enough stock (veggie or chicken) and 1 small can of tomato sauce
Continue to cook lentils, potatoes, and carrots until the liquid has thickened to a creamy texture
While the lentils are cooking, sauté the cilantro, onion, celery, garlic, and tomato (sofrito)
Add sofrito to lentils, along with salt to taste and juice from half a lemon