that aruba check out guy in aruba that questioned you before departing the airport was aruba customs.
they can in fact confiscate certain food items, but rarely do.
paper plates and shampoo etc are very good answers
when i bring frozen food, it is usually if not always cooked (pasta sauces, meat loaf, pot roast, chicken casserole etc)
i am glad to hear that the tsa, retaped your box! "lucky" for you indeed!