Question: how to cook a london broil on george foreman grill?
Answer: Mix all ingredients, except steaks in a ziploc bag, shake well do everything mixes together. Add steaks and let marinate in refrigerator for about a 1/2 hour at least.
Preheat your Foreman Grill on high for at least 5 minutes. This is important! ... 
Add steaks to grill. ... 
Grill 6-9 minutes for medium doneness.