Preheat the oven to 180 degrees.
Place everything into a food processor and blitz until roughly mixed. You don’t want it to become a paste. You could also cut everything small by hand and mix in a bowl. You are looking for the consistency of black pudding. Line a 1lb loaf tin with greaseproof paper and spoon in the mix. Smooth the surface with the back of a spoon and scatter with sunflower seeds. Bake for 40 minutes before turning it out of the tin. Place upside-down on a tray and leave to cook for a further 20 minutes. Leave to cool, then cut into six to eight slices.
Once ready to serve, just reheat each slice on a tray in a hot oven for 10 minutes. Mix the lemon juice, tahini and water with the salt. Drizzle over just before serving with a sprinkle of pomegranate and nigella seeds.