Preheat oven to 450 degrees Fahrenheit.
Cut and peel apples into thin slices.
Mix apples with sugars, cinnamon and nutmeg. Set aside.
Combine melted butter, flour, almonds, oats, cereal and salt until mixture is moistened and forms clumps.
Brown 1 T. butter in a small oven-proof skillet.
Add apples to the pan and cook until slightly soft (about 5 minutes), stirring occasionally.
Spread crumble topping over the surface of the apples.
Place skillet in the oven for 15 minutes, or until bubbly and the topping is starting to turn golden brown.
Carefully remove skillet from the oven and serve relatively quickly, preferably a la mode!