In a large bowl, combine 1-1/2 cups flour, sugar, yeast and salt. In a saucepan, heat the water, milk and butter to 120°-130°. Add to dry ingredients; beat just until moistened. Beat in egg until smooth. Stir in enough remaining flour to form a soft dough. Turn onto a floured surface; knead until smooth and elastic, about 6-8 minutes. Place in a greased bowl, turning once to grease top. Cover and let rise in a warm place until doubled, about 1 hour.
Punch dough down. Press into two greased 12-in. pizza pans; build up edges. In a small bowl, combine the cheese topping ingredients. Spread over dough to within 1/2 in. of edges. In a saucepan, combine the apple topping ingredients; simmer, uncovered, until apples are tender. Spoon over cream cheese layer.
Combine streusel ingredients; sprinkle over apples. Let stand for 15 minutes. Bake at 375° for 30-35 minutes or until crust is browned. Combine glaze ingredients; drizzle over warm pizzas. Cool on wire racks. Yield: 2 coffee cake pizzas (6-8 servings each).