Spread nuts in a baking pan and bake in a preheated 325F oven for 8 minutes or until lightly toasted. Let cool and finely chop. With an electric mixer, beat cheese and sugar until smooth.
Mix in eggs, vanilla, amaretto and sour cream. Reserve 2 tablespoons of nuts and stir in remaining nuts. Pour batter into a greased 9inch springform pan. Sprinkle reserved nuts over the top.
Bake in the middle of a preheated 325F oven for 25 minutes or until just barely set. Turn off the oven, leave the door ajar and let cool in the oven for 1 hour longer. Chill. To serve, remove pan sides and cut into wedges.
