You're in luck - thanks to the pan's ceramic coating, it's a snap to remove: simply fill with water nearly to the brim, and bring it to a boil. Add 2 tablespoons baking soda and gently pry the burned-on residue with a wood spoon (don’t use any utensil that could scratch the coating). This works on just about any burnt-on ceramic stain.
Rinse and dry – and you’re good to go! (Back into cooking with a fresh-looking frying pan, that is.)