Dice the onion and carrot.
Heat olive oil in a pan and sauté the onion and carrot.
Mince the garlic and add it to the pan, sauté together.
Rinse the lentils and add them to the pan.
Pour in the diced tomatoes and vegetable broth.
Season with salt, pepper, and herbs.
Once it starts to boil, simmer on medium heat for about 20 minutes.
When the lentils are tender, it's ready to serve.