In a large bowl, cream the butter, sugar and vanilla. Add eggs, 1 at a time, beating well after each addition. Combine the flour, cinnamon, nutmeg, salt and baking soda; gradually add to creamed mixture and mix well (batter will be stiff). Stir in apples until well combined., Spread into a greased 13x9-in. baking dish. Bake at 350° for 40-45 minutes or until top is lightly browned and springs back when lightly touched. Cool for 30 minutes before serving., Meanwhile, in a small saucepan, combine brown sugar and butter. Cook over medium heat until butter is melted. Gradually add cream. Bring to a slow boil over medium heat, stirring constantly. Remove from the heat. Serve with cake.