1 Wash and dry the fish, cut them into mini dice. Place them in a salad bowl and sprinkle them with lemon juice. Open and stone the avocados. Remove the flesh, without damaging the skin (reserve the shells) and cut it into cubes.
2 Peel and chop the shallots. Add them to the salad bowl with the avocados. Drizzle with a drizzle of oil. Season with salt, pepper and chilli. Mix gently, cover with cling film and set aside for 1 hour in a cool place.
3 Wash and dry the avocado half-shells. Spread the fish tartar in them. Decorate with salmon roe and chopped dill. Serve immediately.