Preheat oven to 400 degrees.
Prepare crust. Beat together butter, brown sugar, white sugar, and salt; add vanilla and egg. Stir in flour. Press approximately two thirds the crust mixture into the bottom of a 9x13 pan. Bake 18-20 minutes or until dry looking and lightly browned. Remove from oven to cool while preparing filling.
Melt butter in 10-inch skillet or dutch oven over medium heat. Add sliced apples, optional raisins, lemon juice, water, ¼-cup sugar, cinnamon and nutmeg. Cover and cook, stirring occasionally until apples are tender and most of the moisture has evaporated. Spread apples over baked crust.