In a large bowl, beat egg whites, sugar, oil and vanilla together. In a second bowl, mix flour, baking powder, salt and poppy seeds together. Blend flour mixture into egg mixture; mix well.

Roll out a portion on a floured board and cut into 3 and 1/2 inch circles. Please a teaspoon of filling of your choice in the center of each circle of dough. Bring up dough to cover filling and pinch together to form a triangle. Place on lightly greased cookie sheet. Brush with egg white and bake at 350 degrees for 20 minutes or until golden.

Yields 5 dozen.

Can be frozen before baking by placing on a rack. When frozen, transfer to a sealed container and bake when desired.