5 lg. egg, separated, room temp.
1 tbsp. fresh lemon juice
1 1/4 c. sugar, divided
1 c. (2 sticks) unsalted butter, room temp.
1 tsp. grated lemon peel
1/2 tsp. salt
1/2 tsp. ground mace
1 tsp. vanilla
2 c. sifted flour
Confectioners' (10X) sugar

Preheat oven to 300 degrees. Lightly grease 9"x5"x3" loaf pan; dust with flour; top out excess.