In a pot over medium heat, add olive oil, onions, garlic, and carrots. Saute for 6 to 7 minutes until browned. Add lentils and saute for 2 to 3 minutes more.
Add the chicken broth and water. Bring to a boil, then lower the heat, cover, and simmer for 45 to 50 minutes until everything is softened. Use an immersion blender to blend until smooth.
Season with black pepper, turmeric, cumin, and salt to taste.
Serve in bowls with a squeeze of lemon on top and red pepper flakes. Enjoy warm with crispy bread or pita chips.