OmniaNon-Stick Oven Pan with Ceramic Coating for Camping Oven

Do you use the nonstick pan inside the original pan like the silicon inserts or instead it the original pan

Does it not have a lid? Can you use any other lid?

Can the baking grid be used in the nonstick pan without damaging the ceramic coating?

What is this made of? Is it aluminum or stainless steel with a non-stick coating?