Salzburger Nockerln

Yield:	4 Servings
Categories:	Ethnic, Desserts

4	ts	Unsalted butter
4	ts	Currant or grape jelly
		Whites of 9 large eggs, at room temperature
1/2	c	Vanilla sugar
		Zest of 1/2 lemon, grated
		Yolks of 4 eggs
1/4	c	Granulated sugar
1/2	c	Sifted all purpose flour