1hr 10min · 10 servings 3 (8-ounce) packages of cream cheese, at room temperature 1 cup sugar 1 cup sour cream 2 1/2 teaspoons vanilla extract 3 eggs, at room temperature 3 cups apple, peeled, cored and sliced 1/4-inch thin (I used Golden Delicious) 1 teaspoon cinnamon 1/4 salt 2 tablespoons sugar Topping: 1/4 cup all-purpose flour 1/4 cup old-fashioned oats 1/4 cup brown sugar 1 teaspoon cinnamon 2 tablespoons butter, at room temperature