When I try to preheat the grill, the aluminum foil burns and then my food tastes burnt. I've been using cooking spray. What can prevent this?
Seriously,don't use cooking spray anymore. since it would do nothing for the aluminum. it might just worsen the condition.
best thing to do is use low heat for your cooking.
since you're using foil, why not just steam your food, much faster and easier that way.