Yes. You can bake it at any temperature you wish
Yes you do cook lasagna before freezing it.
if the recipe states 350 degrees that is what you do, higher would burn it
simmer the sauce, boil the noodles and bake the lasagna
I normally back my lasagna for about an hour at 350 to 425
Yes.
Yes, Trader Joe's carry a few varieties of frozen lasagna.
Heat the oven to about 200oC then put your lasagna on a baking tray and into the oven, cover the lasagna with foil for the first 20 minutes or so whilst the lasagna defrosts, then remove and bake for a further 20 minutes, test the lasagna to make sure it is hot in the centre before you serve it.
Lasagna is suitable for freezing because all of its components freeze and it doesn't separate when frozen.
Chocolate no bake cookies tend to crumble if frozen then defrosted.
No. If you're cooking 2 pans of frozen lasagna, put them both in the oven at the same time and follow the directions as if you were cooking just one.
sit it in some hot water