1Rinse the lentils under cold water and set aside.
In a large pot, heat the olive oil over medium heat.
Add the diced onion, carrots, and celery. Sauté for about 5-7 minutes until the vegetables are softened.
Add the minced garlic, ground cumin, turmeric, and red pepper flakes. Cook for another 1-2 minutes until fragrant.
Pour in the vegetable broth, diced tomatoes (with their juice), and lentils. Stir to combine.
Bring the mixture to a boil, then reduce the heat to low and let it simmer for about 25-30 minutes, or until the lentils are tender.
Season with salt and pepper to taste.
Stir in the chopped fresh cilantro just before serving.
Serve hot and enjoy your Spicy Lentil and Vegetable Stew!