Season steaks with salt and pepper. Blend juice of 1/2 orange with butter. Cut remaining 1/2 in thin slices. Brush steaks with 1/2 of the orange butter. Set them on a greased grill, 3-4 inches from heat. Cook 5 minutes, until steak is brown. Turn, brush with remaining orange butter and broil 5 minutes more or until fish flakes easily when tested with a fork. Garnish with orange slices.