Spray 13x9-inch pan with cooking spray. In medium bowl, mix flour, cinnamon, baking soda and salt. In large bowl, stir together melted butter, sugar, eggs and 1 teaspoon of the vanilla until blended. Stir in flour mixture just until blended. Stir in apples and 1 cup of the toasted pecans. (Batter will be very thick, similar to cookie dough.) Spread batter in pan.