Rinse black beluga lentils thoroughly under water.
In a pan or pressure cooker, heat oil and sauté chopped onions until golden.
Add minced garlic and cook for a minute.
Add chopped tomatoes and cook until soft and mushy.
Add spices like turmeric, cumin, and garam masala; mix well.
Add lentils and water, then bring to a boil.
Cover and cook until lentils are tender (20–25 minutes or pressure cook for 3–4 whistles).
Adjust salt and consistency by adding water if needed.
Simmer for a few minutes to enhance flavor.
Garnish with fresh coriander and serve hot.