2/3 c  Teriyaki sauce
2 lb Sirloin
1/2 c  Water
1 ts Cornstarch
1 tb Sugar

Pour teriyaki sauce over steak in shallow pan; marinate 15-20 minutes.
Remove steak & place on grill, 4-5″ from heat. Cook to desired
doneness. Meanwhile, blend 1/2 cup marinade with remaining
ingredients; thicken over med heat, stirring constantly. Serve with
steak.