Apple Pie Cake

Name: Apple Pie Cake
Prep time: 15 min
Total time: 15 min
Cuisine: American
Ingredients: Cooking Spray; 1 cup chopped toasted pecans; 1 cup plus 3 Tbsp. packed light brown sugar, divided; 0.25 cup plus ⅓ cup melted butter, divided; 1.25 teaspoon apple pie spice, divided; 2 pounds Granny Smith apples, peeled and cut into ¼-inch-thick slices; 1 tablespoon fresh lemon juice (from 1 lemon); 1 package (15.25-oz.) pkg. classic white cake mix (such as Duncan Hines); 1 cup whole milk; 3 large egg whites