Apple Custard Bars: 3 medium apples, such as gala or pink lady, peeled, ½ cup all-purpose flour, 1 tsp. baking powder, ½ tsp. ground cinnamon, ¼ tsp. grated nutmeg, 2 large eggs,1/3 cup sugar, pinch of coarse salt, 2 tsp. vanilla extract, 6 tbsp. whole milk, 2 tbsp. unsalted butter, melted and slightly cooled.