To lose fat you need both a caloric deficit and hormonal balance. To lose stubborn fat, particularly stubborn belly fat, you need to understand the hormones involved. In women those hormones are: insulin, cortisol, estrogen, progesterone, and testosterone. And of course the major fat burning hormones, the catecholamines.
Grilling the Meat. If you've marinated the meat in the refrigerator, take it out while the grill is heating up. Remove it from the marinade and place the London broil on the hot grill. Cook the meat for approximately 8 to 10 minutes on each side until the internal temperature reaches 130 to 135 F for medium-rare. Although the U.S. Department of Agriculture recommends cooking beef to a minimum of 145 F, cooking London broil to higher temperatures typically yields tougher meat.
Identify the grain of the London broil. It is similar to wood grain and resembles small lines running throughout the steak. Start cutting the London broil into 1/8-inch strips against the grain at a 45-degree angle. This is a slight angle, which will create diagonal cuts in the steak. Continue cutting until only steak strips remain. Serve the London broil with a prepared sauce to help keep the meat moist and juicy.