you can follow these steps:
Preheat your oven to 400°F (200°C).
Season your London broil with your choice of seasonings. Common options include salt, pepper, garlic powder, onion powder, paprika, and herbs like thyme or rosemary.
Heat a cast iron skillet or oven-safe pan over high heat on the stove.
Sear the London broil on each side for 2-3 minutes to create a nice crust.
Transfer the skillet with the London broil to the preheated oven.
Cook the London broil in the oven for about 15-20 minutes for medium-rare doneness, or longer if you prefer it more well-done. The internal temperature should reach 135-145°F (57-63°C) for medium-rare to medium doneness.
Remove the London broil from the oven and let it rest for about 5-10 minutes before slicing against the grain.
Serve and enjoy your deliciously cooked London broil!
Remember to use a meat thermometer to ensure your London broil is cooked to your preferred level of doneness.