This salad is light and refreshing with clean, well-balanced flavours. Choose the best-quality sashimi tuna available — yellowfin, bluefin, big eye or albacore.
Preheat oven to 200°C and roast capsicums, turning regularly, until skin blisters, then peel. Finely dice capsicums and mix with capers, olives, parsley and red onion. Stir in half the olive oil and season with salt and pepper.