In a medium pot, melt 1 Tbsp niter kibbeh over medium heat. Add onion and saute for ~ 10 minutes or until golden brown. Add garlic and saute for another minute.

Add tomato paste and cook for 5-7 minutes, stirring frequently, until browned. Add tomatoes and berbere spice. Cook for another 2-3 minutes.

Add lentils, stock, and salt. Bring to a boil, reduce heat to medium-low, and simmer, covered, for about 40 minutes until lentils are tender. Stir occasionally. If lentils look dry, add more stock or water a half cup at a time.

Stir in remaining Tbsp of niter kibbeh and remaining berbere spice, if desired. Simmer for another 2-3 minutes. Serve.