Tray-baked mullet with green herb dressing

Ingredients

• 1 purple kūmara, scrubbed
• 1 orange or golden kūmara, scrubbed
• 1 bunch baby orange carrots
• 1 bunch baby purple carrots
• 1 red onion, cut into wedges
• 2 whole medium-sized mullet, gutted and scales removed
• 1 lemon, sliced
• 3-4 sprigs dill
• 2-3 tbsp olive oil
• sea salt
• Green herb pepper dressing
• 2 cloves garlic
• 2 handfuls baby spinach leaves
• small bunch parsley
• 1 tbsp toasted pine nuts
• 1/4 cup olive oil
• 2-3 tbsp hot water