Combine, in a med. bowl, egg and sour cream. In a small bowl stir together flour, 2 tablespoons sugar, baking powder, baking soda and salt; add to
sour cream mix. Mix well. On a lightly floured surface, roll dough to a 12-inch square. Spread apples atop. In a small bowl combine 1/4 cup sugar, cinnamon, nutmeg; sprinkle atop apples. Carefully roll up dough. Cut into twelve 1-inch slices. Place slices, cut side down, in a greased 13x9-inch baking pan. Stir together water, brown sugar, 1 cup sugar, cornstarch and lemon juice; pour over slices in pan. Dot with butter.
Bake, uncovered, at 350°F for 35-40 minutes or until golden.