In a large bowl, combine 1-1/2 cups flour, sugar, yeast and salt. In a saucepan, heat water, milk and butter to 120°-130°. Add to dry ingredients; beat for 2 minutes. Stir in enough remaining flour to form a firm dough. Turn onto a floured surface; cover and let rest for 15 minutes.
Meanwhile, in a large skillet, cook and stir apples in butter over medium heat for 2 minutes. Combine the sugar, flour and cinnamon; stir into skillet. Cook 3 minutes longer. Reduce heat to low; cook, uncovered, for 4-6 minutes or until apples are tender, stirring frequently.
In a small bowl, combine the cheese topping ingredients. For streusel, in a small bowl, combine flour and sugar; cut in butter until crumbly.
Pat dough onto a greased 14-in. pizza pan, building up edges slightly. Spread with cheese topping, then apple topping. Sprinkle with streusel. Bake at 375° for 20-25 minutes or until crust is golden brown. Serve warm or cold. Yield: 10-12 servings.