Rinse and dry the fish, then wrap in cling film and freeze for one hour to make slicing easier. Mix ponzu, sugar and avocado oil in a small bowl.
Unwrap the salmon and slice diagonally into very thin pieces. Arrange a layer of the salmon over a shallow dish, then spoon over a little of the marinade – spreading it to evenly coat the fish. Continue slicing and layering, finishing with a layer of marinade. Cover with cling film, directly over the fish, and chill for one hour. Meanwhile, slice avocado thinly.
Arrange the salmon and avocado slices attractively on a platter and top with alfalfa, scatter snow pea shoots. Serve with lemon wedges.
Notes
Serve with thinly sliced sour dough bread or your favourite crackers.