Add steaks to pan; cook 3 minutes on each side or until browned. Reduce heat to medium-low; add butter, thyme, and garlic to pan. Carefully grasp pan handle using an oven mitt or folded dish towel. Tilt pan toward you so butter pools; cook 1 1/2 minutes, basting steaks with butter constantly.
Remove steaks from pan; cover loosely with foil.
Let stand 10 minutes. Reserve butter mixture.
Cut steak diagonally across grain into thin slices. Discard thyme and garlic; spoon reserved butter mixture over steak.