Cheesecake Supreme (mascarpone) Recipe

Crust:
2cups of fine cracker crumbs
1/4c chopped nuts (walnuts, hazelnuts)
1/2tsp cinnamon
1/2c butter, melted
Filling:
3 eggs
1c sugar
1/4tsp salt
2tsp vanilla
1T lemon juice, zest of lemon
16 oz cream cheese
16 oz marscarpone cheese
2 c ricotta
1 c sour cream

Crust: Butter sides of 9" springfoam pan. Combine all ingredients and press it, going up sides of pan. Chill.
Filling: Beat 2 egg white till stiff. Set aside. Blend 3 yolks and 1 egg white with: sugar, salt, vanilla, lemon juice and zest beating well. Add bit by bit cream cheese, marscarpone, ricotta and sour cream, blending well. Fold in beaten egg white SLOWLY. Fill chill crusted pan. Bake in oven 400 degrees for first 10 minutes; lower to 350 degrees for 40 minutes or until just set.