Put 2 lemon slices and 1 sprig of dill in cavity of each fish. Season fish liberally with salt and pepper. Drizzle 30 ml olive oil over fish to prevent sticking during cooking and place fish on a baking tray.
Mix Harissa with the remaining olive oil and the lemon juice.
Heat some vegetable oil in a deep-fryer or saucepan to 180°C/350°F and deep-fry ba