how long to cook stouffer's lasagna
Rating Newest Oldest. 1  Stouffer Lasagna Cooking Instructions. 2  Family Size Lasagna. 3  stoufferlasagna meat sauce family size long cook.  Cook it at 350 for one hour with the cover 1  on. Frozen: cover w/ foil, bake at 350Âº for 75-90 2  min. The box says, pre-heat oven to 450 degrees..  Can you microwave stouffers 1  lausanga. The directions on the box  say: