Winter vegetable stew with mixed beans and chickpeas

2 tsp olive oil

1 onion, well chopped

2 leeks, washed well and sliced

½ tsp ground coriander

½ tsp fennel seeds, crushed

1/8 tsp ground cumin

1/8 tsp cayenne pepper

1 garlic clove, finely diced

1 butternut squash, peeled and cubed

1 carrot, peeled and sliced

1 potato, peeled and chopped

1 tbsp harissa paste (found in large supermarkets)

1 ½ tsp tomato paste

¾ tsp salt

2 turnips, peeled and cut into wedges

200g tinned chickpeas, drained

200g tinned mixed beans, drained

Handful green beans, ends removed and cut in half

865ml vegetable stock

Handful flat parsley, roughly chopped

1 ½ tsp honey

245g uncooked couscous

4 lemon wedges, optional for garnish

Sprig flat parsley, garnish (optional)