That looks horrible. And why the fuck is any sane person preparing a cassetole in a throwaway baking dish?
1 - you don’t have to worry about leaving a dish
2 - you don’t have to clean it after a get together that is probably exhausting
3 - aluminum is one of the materials that is actually very recyclable, so it’s not a big deal like plastic is.
75% of all aluminum ever mined is still in circulation- its also more efficient- recycling aluminum takes 5% of the energy it takes to produce it.