Preheat oven to 200°C or 180°C fan. Lightly grease a 25cm springform pan and line base with baking paper.
To make Cheese Crust, place all ingredients in a food processor and pulse until mixture resembles breadcrumbs. Set aside 3/4 cup of mixture for topping. Using back of a spoon, press remaining mixture into prepared pan to cover base and come halfway up sides.
Place salmon in a food processor with sour cream, cheese, egg, Tabasco and green onion. Pulse until lightly mixed, being careful not to over-process. Pour into prepared pan. Crumble reserved Cheese Crust mixture on top. Bake for 40 minutes, until cooked and golden. Remove and stand for 15 minutes before serving.