Moroccan lamb, tomato and lentil soup (Harira)

Name: Moroccan lamb, tomato and lentil soup (Harira)
Prep time: 20 min
Cook time: 2 h 25 min
Total time: 2 h 45 min
Cuisine: African, Moroccan
Ingredients: 2 tablespoons olive oil; 700g diced lamb (we used shoulder); 1 onion, chopped; 2 garlic cloves, chopped; 2 tablespoons tomato paste; 11/2 teaspoons ground cumin; 2 teaspoons sweet paprika; 1/2 teaspoon ground cloves; 1 bay leaf; 1L (4 cups) beef stock; 2 x 400g cans Ardmona Rich & Thick Classic Tomatoes; 1/2 bunch coriander, leaves finely chopped, plus extra leaves to serve; 2 x 400g cans chickpeas, rinsed, drained; 2 x 400g cans brown lentils, rinsed, drained; Thick Greek-style yoghurt, to serve; Toasted pita bread, to serve