Slow Cooker Garlic Sesame Beef

6 green onions, sliced

1/2 cup sugar

1/2 cup water

1/2 cup reduced-sodium soy sauce

1/4 cup sesame oil

3 tablespoons sesame seeds, toasted

2 tablespoons all-purpose flour

4 garlic cloves, minced

1 beef sirloin tip roast (3 pounds), thinly sliced

Additional sliced green onions and toasted sesame seeds

Hot cooked rice

In a large shallow dish, mix the first 8 ingredients. Add beef; turn to coat. Refrigerate, covered, 8 hours or overnight. Pour beef and marinade into a 3-qt. slow cooker. Cook, covered, on low 5-7 hours or until meat is tender. Using a slotted spoon, remove beef to a serving platter; sprinkle with additional green onions and sesame seeds. Serve with rice.