Grilled Beef and Broccoli Kebabs

INGREDIENTS

2 lb

sirloin steak (cut into 1 1/2-inch cubes)

5 cups

broccoli florets (with about 1" stem)

1/4 cup

olive oil (plus more for broccoli)

1 tsp

cornstarch

1/4 cup

water

1 tbsp

Japanese rice wine (or dry sherry, not vinegar)

1/4 cup

quality oyster sauce ((like Lee Kum Kee or Kikkoman)*)

3 tbsp

brown sugar

1 tbsp

sesame oil

1 tsp

garlic powder

1/2 tsp

ginger powder

1/2 tsp

salt

1/2 tsp

pepper

1/2 tsp

onion powder

1 tsp

red pepper flakes