Chermoulla fish with vegetable couscous

Ingredients

• 1/2 cup coarsely chopped flat-leaf parsley
• 1/2 cup coarsely chopped coriander
• 1 medium red onion, coarsely chopped
• 2 cloves garlic, chopped
• 1 fresh long green chilli, seeded, coarsely chopped
• 2 1/2 teaspoon ground cumin
• 1 1/2 teaspoon ground turmeric
• 3 teaspoons paprika
• 1/4 cup lemon juice
• 500 grams firm white fish fillets, cut into 4 cm pieces
• 1 tablespoon vegetable or olive oil
• 1 medium brown onion, finely chopped
• 400 grams can diced tomatoes
• lime wedges, to serve
• Vegetable couscous
• 2 cups (235g) frozen mixed vegetables
• 1 1/2 cup couscous
• 1 teaspoon finely grated lemon zest
• 2 tablespoons chopped coriander