Cook onion and garlic, stirring frequently, until the onion has softened and is turning clear.
Add bay leaf and spices and cook, stirring continuously, for 1 to 2 minutes longer.
Tip in the lentils and the stock (made with the water and the stock powder), bring the mixture to the boil, then reduce the heat to a gentle simmer. Cover the pan with a lid whilst simmering, so that the liquid does not evaporate too quickly.
Cook until the lentils are tender, about 25 - 30 minutes.