3-4 medium white onions, chopped

2 cups cold butter or margarine, divided

1 tablespoon poppy seed

1 1/2 teaspoons salt

1 1/2 teaspoons paprika

1 teaspoon fresh coarse ground black pepper

4 cups all-purpose flour

1/2 cup cornstarch

1 tablespoon baking powder

1 tablespoon sugar

1 tablespoon brown sugar

5 eggs

3/4 cup milk

3/4 cup sour cream

 

In a large skillet, cook onions in 1/2 cup butter over low heat for 10 minutes. Stir in the poppy seeds, salt, paprika and pepper; cook until golden brown, stirring occasionally. Remove from the heat; set aside. In a bowl, combine the flour, cornstarch, baking powder and sugars. Cut in 1-1/4 cups butter until mixture resembles coarse crumbs. Melt the remaining butter. In a bowl, whisk the eggs, milk, sour cream and melted butter. Make a well in dry ingredients; stir in egg mixture just until moistened. Spread into a greased 10-inch springform pan. Spoon onion mixture over the dough. Place pan on a baking sheet. Bake at 350 degrees for 35-40 minutes or until a toothpick inserted near the center comes out clean. Serve warm.