1 - Place a large saucepan over medium heat and add oil.

2 - When hot, add chopped vegetables and sauté until softened, 5 to 10 minutes.

3 - Add 6 cups water, lentils, thyme, bay leaves and salt.

4 - Bring to a boil, then reduce to a fast simmer.

5 - Simmer lentils until they are tender and have absorbed most of the water, 20 to 25 minutes.