American Cheesecake

My husband insisted on my baking it and I obliged:) It turned out great, better than the previous time, may be because I slightly changed the recipe. Since I couldn't find it online, I'm submitting my own version of the American Cheesecake:

1 1/3 c flour
1 1/4c sugar
1tsp baking powder
200g cold butter, cubed
4 eggs
2 pkg vanilla sugar
juice of 1 lemon
500g quark
round baking pan d 24cm, greased

Knead the flour, half the amount of sugar, butter, 1 egg, baking powder and 1 package vanilla sugar into soft dough. Roll it out and cover the baking pan with it. There should be an edge of about 2 cm.
Break the remaining eggs separating the yolk from the egg white. Mix the yolks with the rest of sugar, vanilla sugar, lemon juice and quark.
Whip the egg whites till stiff and carefully add to the yolks mixture. Transfer it to the pan and bake at 200*C for about 50 min. Serve cold.