Rub steaks with garlic.
Sprinkle with half the salt and pepper.
Score fatty edges of steak.
Place on broiling pan 3 inches from heat.
Broil on one side to desired degree of doneness.
Turn; season uncooked side with remaining salt and pepper.
Return meat to broiler; cook to desired doneness.
While steak is broiling, melt butter.
Add mushrooms; saute until golden brown and tender.
Arrange steaks on serving platter; cover with sauteed mushrooms.