Add tomatoes and lamb with any accumulated juices. Bring to a boil.
Add 2 1/2 cups stock.
Return to a boil, reduce heat to low, partially cover, and simmer, stirring occasionally, until lamb is tender, about 1 hour 30 minutes to 2 hours.
Stir in chickpeas; simmer until heated through, about 10 minutes.
Stir in apricots, raions, dates and tomato paste; simmer until heated through, about 5 minutes.
Season with salt and pepper.
Spoon couscous onto a large, shallow platter, forming a large well in center. Spoon tagine into center or do it opposite. Sprinkle chopped parsley/coriander over and decorate with roasted almonds.
Serve the dish together with natural yoghurt with pressed garlic and grated, squeezed cucumber.