Beat egg yolks and whole egg on high speed of electric mixer until thick and lemon coloured. Gradually add ½ cup sugar, beat until very thick, about 7 minutes. Gently fold in the nuts and breadcrumbs or (all-purpose flour instead of the breadcrumbs.)
Beat the egg whites and a 1/4 cup sugar till soft peaks form.
Gently fold 1/4 of the stiff egg whites into the yolks thoroughly and gently. Sprinkle flour over mixture and fold in with remaining egg whites.
Turn into a greased 10” spring form pan.
Bake at 275°F for 55 to 65 minutes or until cake shrinks slightly from sides of pan
Remove pan ring and let cake cool.
When cake is completely cool, cut in half lengthwise to make a top and bottom layer. with a very long bladed knife. For a taller cake double the recipe and make 2 cakes which will give you 4 layers.