Piri-piri prawns and harissa couscous

Ingredients For the piri-piri prawns 2 red chillies, seeds removed, roughly chopped 1 dried chilli, roughly chopped ½ lemon, juice only 3 garlic cloves, peeled 1 tbsp sweet smoked paprika 4 tbsp olive oil 1 tbsp red wine vinegar 1 tsp sea salt ½ tsp freshly ground black pepper 12 very large African prawns, shells removed but tails left on, cleaned For the couscous 200g/7oz wholegrain couscous 400ml/14fl oz boiling water 1 tsp harissa 1 tbsp pomegranate molasses 1 tsp baharat spice mix (available from Middle Eastern stores and some supermarkets) ½ lemon, juice only 1 red onion, finely sliced 1 pomegranate, fleshy seeds only 1 small bunch coriander, roughly chopped 1 lemon, quartered, to serve Preparation method For the piri-piri prawns, place all the ingredients except the prawns into a food processor and blend until smooth. Place the prawns on a plate and rub over the piri-piri sauce, reserving a little to garnish. Leave to marinate in the fridge for an hour. Heat a griddle pan until hot and cook the prawns for 4-5 minutes on each side, depending on their size, until the prawns have turned pink and are cooked through. For the couscous, place the couscous into a bowl, pour over the boiling water and stir with a fork to combine. Add the harissa, pomegranate molasses, baharat and lemon juice and stir once more. Cover with cling film and set aside for 3-4 minutes, until all the liquid has been absorbed into the couscous. Remove the cling film and fluff up with a fork. Add the red onion, fleshy pomegranate seeds and coriander and mix well. To serve, place three prawns onto each plate with a pile of couscous. Drizzle over the reserved piri-piri sauce and a squeeze of lemon.