Cut the leek into thin slices.
Finely chop the garlic and slice or chop the red pepper.
Heat the oil a large saucepan. Add the onion and red pepper and soften it for 10 minutes, then add the garlic and spices. Stir for a minute, then add the stock and let it bubble for a minute, then add the rice and warm through.
Drain the chickpeas and add to rice, together with the lamb pieces. Season with salt and pepper.
Cover and gently simmer for a couple of minutes to warm through.
Finally, stir through the fresh herbs and serve.