One-pan roast salmon with leeks, onions & parsley dressing recipe | Good Food

Ingredients

• 2 small white onions cut into quarters
• 2 red onions cut into quarters or large wedges
• 2 tbsp olive oil
• 1 leek cut into rounds
• 4 spring onions trimmed
• 2 salmon fillets (about 150-200g each)
• 1 anchovy
• 1 tbsp capers drained
• 2 handfuls of parsley leaves
• 1 shallot finely chopped
• 1 tbsp Dijion mustard
• 1 tbsp red wine vinegar
• 2-3 tbsp olive oil