In a large skillet, heat the extra-virgin olive oil over medium heat.
Add the diced onion, minced garlic, diced carrot, and diced celery to the skillet. Sauté for 5-7 minutes or until the vegetables are softened.
Add the cooked lentils, crushed tomatoes, dried oregano, dried basil, salt, and pepper to the skillet. Stir well to combine.
Reduce the heat to low, cover, and simmer for 20-30. Enjoy!