Preheat grill to 200°C/400°F.
Pat the sea bass fillets with a paper towel to remove any excess moisture. Season both sides with salt and pepper.
To a food processor, add 2 tbsp extra-virgin olive oil, a handful of fresh basil, the juice of half a lemon, 2 cloves of garlic, and salt and pepper.
In a cast-iron pan, add 1 tbsp extra-virgin olive oil and heat over medium-high heat.
Place the sea bass skin-side down and leave to fry for around 3 minutes, or until crispy. Remove from the pan, then add another tbsp of extra virgin olive oil. Place the courgettes score-side down and add the cherry tomatoes into the pan.
Fry for 3 minutes, then rotate the courgettes and stir the tomatoes in the pan. Season generously with salt and pepper.
Add the sea bass back into the pan, skin facing down and brush with a little basil oil. Add the olives into the pan too, then pop under the grill for 10-15 minutes.
Finish with the remaining basil oil, lemon wedges, black pepper and optional chilli flakes. Dig in!