freezing, quick question!

i made lasagna 2 days ago, and than let it cool off and put the tray in the freezer and covered it with aluminum foil

....today i want to bake it, i took it out 2 hours ago and just let it sit on the table to defrost...


am i supposed to defrost it before putting it in the oven?? or should i just bake it? i dunno
im confused and dont want to ruin todays dinner...have a few ppl coming over too
please help


signed,
amateur cook