Kiwi & Chili-Rubbed Beef Short Ribs

Ingredients:

2 pounds Korean-style (aka flanken style) beef short ribs
1 kiwi
For the chili rub:
1 tbsp ancho chili powder
1 tbsp sugar
1 tbsp kosher salt
2 tsp freshly ground black pepper
1 tsp garlic powder
1/4 tsp cayenne, or to taste