What is the best way to: Top prepare the baking dish,

OPT:
a). roll out a 2' long piece of aluminum foil, crumple it into a ball with your hands, and press the ball into the bottom of the baking dish..
b). roll out a 2' long piece of aluminum foil, and press it into the bottom and sides of the dish and crumple the extra over the sides and top..
Answer:
b).