Topping: In a small bowl mix the oil, brown sugar, and corn syrup.
Pour into a 9-inch round cake pan. Sprinkle with nuts. Arrange apple
slices over topping.
For Batter: Combine 3/4 cup flour, sugar, undissolved yeast and salt in a large bowl. Heat milk, water, and oil until very warm (120° to 130°F). Add to flour mixture; beat 2 minutes until well blended. Beat in eggs, vanilla, cinnamon and 1/2 cup flour. Add remaining flour and mix until smooth. Spoon batter over apples in prepared pan.
Cover and let rise in warm place 45 minute to 1 hour.
Bake in preheated 375°F for 25 to 30 minutes or until golden brown. Cool 15 minutes in pan; invert onto serving plate. Serve warm.