We enjoyed this yesterday after church. It's been a mild enough winter to bring out the grill on more than one occasion this winter.  I let the steak marinate for about 5 hours.  It was perfect!

From Taste of Home's The Busy Family Cookbook

Teriyaki Sirloin Steak

Ingredients

• 1/2 cup soy sauce
• 1/4 cup canola oil
• 1/4 cup packed brown sugar
• 2 teaspoons ground mustard
• 2 teaspoons ground ginger
• 1 teaspoon garlic powder
• 1 to 1-1/2 pounds beef top sirloin steak (3/4 inch thick)

Directions

• In a large resealable plastic bag, combine the first six ingredients; add the steak. Seal bag and turn to coat; refrigerate for 8 hours or overnight.
• Drain and discard marinade. Grill steak, covered, over medium heat for 5-8 minutes on each side or until meat reaches desired doneness (for medium-rare, a meat thermometer should read 145°; medium, 160°; well-done, 170°). Yield: 4-6 servings.