Dinner

Heat olive oil in a large saucepan over medium heat, then add chopped onion, garlic, carrots and celery and sauté until softened (5 to 10 minutes)
Add lentils, thyme, bay leaves and salt and pour in 6 cups water; bring to a boil, then reduce to a fast simmer
Simmer until lentils are tender and have absorbed most of the water, 20 to 25 minutes; drain any excess water if necessary and serve or cool to reheat later
Replace part of the water with chicken stock, reducing the water by the same amount, for a fuller taste