"London broil" can refer to several cuts of meat, some are tougher than others. I always use flank steak, not frozen, and marinate it 12 - 24 hours. This isn't to tenderize the steak, but to add flavour. I broil flank steak for about 6 to 8 minutes each side, then tented with foil for up to 20 minutes before slicing thinly across the grain. Don't slice immediately after cooking; the resting period is important.
So I think you should thaw (in the refrigerator) and marinate the steak first.
Long enough to cook it to your liking.
2 hours
Typically, you cook a frozen pizza in the oven for about 12-15 minutes at 425F.
You typically cook frozen lasagna in the oven for about 1.5 to 2 hours at 375F.
For optimal results, cook a frozen lasagna for about 1.5 to 2 hours at 375F.
A frozen lasagna typically takes about 1.5 to 2 hours to cook in the oven.
Yes, it is generally safe to cook meat from frozen as long as it is cooked thoroughly to the appropriate internal temperature. You can cook meat from frozen without thawing it first, but it may take longer to cook and may not cook as evenly.
A prime rib can be frozen, but it should be thouroughly thawed before cooking.
You typically need to cook frozen lasagna in the oven for about 1.5 to 2 hours at 375F.
Frozen lasagna typically takes about 1.5 to 2 hours to cook in the oven at 375F.
Long enuf
12 minutes