Charcoal-Grilled Tuna, Coriander Seeds, Lemon and Courgettes | Guest Recipes | Nigella's Recipes | N

Ingredients

• 2 small trombetta courgettes (or small, firm green courgettes)
• olive oil (for cooking)
• 2 small garlic cloves (finely chopped)
• ½ teaspoon dried chilli flakes
• 1 tablespoon coriander seeds (lightly crushed)
• 100 millilitres extra virgin olive oil
• juice of ½ lemon
• 4 teaspoons sweet white wine vinegar (e.g. Chardonnay or moscatel vinegar)
• 4 thick slices of fresh tuna (each about 180–200g)
• 1 tablespoon picked oregano leaves
• sea salt and freshly ground black pepper