Stir in the minced garlic, cumin, coriander, and turmeric. Cook for an additional 1-2 minutes until fragrant.
Add the rinsed lentils and vegetable broth to the pot. Bring to a boil, then reduce the heat to low and let it simmer for about 30-35 minutes, or until the lentils are tender.
Once the lentils are cooked, stir in the lemon juice and season with salt and pepper to taste.
Use an immersion blender to blend the soup slightly for a creamier texture, if desired. Alternatively, you can leave it chunky.