Lamb meatballs in spicy tomato sauce (lamb kofta)

Name: Lamb meatballs in spicy tomato sauce (lamb kofta)
Prep time: 15 min
Cook time: 1 h 5 min
Total time: 1 h 5 min
Yield: 4 portions
Ingredients: oil; 2 garlic cloves; 200 g onions; 10 sprigs fresh parsley; 10 sprigs fresh mint; 10 sprigs fresh coriander; 1 tsp Arabian spice mix; 2 tsp ground sumac; 1 tsp salt; 1 pinch freshly ground black pepper; 500 g lamb mince; 250 g basmati rice; 2 tsp coriander seeds; 3 garlic cloves; 200 g onions; 30 g olive oil; 2 fresh green chillies; 900 g ripe tomatoes; 1 heaped tsp vegetable stock paste, homemade; 1 tsp dried oregano; 1 tsp salt; 1 tsp freshly ground black pepper; 300 g water; 1 heaped tbsp cornflour (starch); 5 sprigs fresh coriander