Pre-heat the broiler in your oven to high. In a small bowl, combine yuzu and wasabi and stir to mix. Shingle the avocado slices on an oven-proof dish and season with Maldon salt and freshly ground black pepper. Brush yuzu-wasabi mixture over avocado. Top with salmon slices, lightly brush on sesame oil and season. Place dishes under broiler until just hot, about 1- 2 minutes. The salmon will still be rare. Enjoy, being careful of the hot plates.