Heat oil in chasseur pot or saucepan. Add lamb, onion, garlic, salt, pepper, spices, herbs and water. Cover and bring to the boil.
Lower the heat and simmer until well cooked - about 60mins (adding more water if necessary).
Add prunes and honey.
Mix plain flour with enough water to make a smooth paste and add to meat. Stir well to combine.
Cook on a low heat til meat mixture thickens - about 10 to 15 mins.
Place baking paper on a tray and toast sesame seeds, blanched and slivered almonds in moderate oven til golden.
Serve lamb tagine topped with almonds and sesame seeds plus extra coriander leaves.