Catfish hero with seared tomatoes and herbed mayo Recipe | Food Network UK

Ingredients

• Cooking spray
• 4 Roma tomatoes, sliced into 1/2cm-thick rounds
• Salt and freshly ground black pepper
• 120ml mayonnaise
• 2 tbsps chopped fresh basil
• 1 tbsp chopped fresh chives
• 2 tsps Dijon mustard
• 1 tsp finely grated lemon zest
• 4 long sandwich rolls
• Cooked catfish fillets, about 350g total
• Lettuce leaves
• Thinly sliced red onion