Heat 1 tbsp olive oil in a large saucepan over medium-high heat, add vegetables and sauté for about 3 minutes until starting to soften, stir in spices until fragrant, then add stock, chickpeas and tomatoes and bring to the boil.
Reduce heat to medium, season to taste with salt and freshly ground pepper and simmer for about 10 minutes until well-flavoured and vegetables are tender.
Meanwhile, heat remaining olive oil in a frying pan over medium-high heat, brown lamb well all over, add to stew and simmer to warm through.
Stir through a handful of parsley, squeeze in lemon juice to taste and check seasoning, serve hot with thick natural yoghurt.
