Bokkeumbap (볶음밥)

Ingredients:

2 bowls of cooked rice (about 3 cups)
1-2 tablespoons vegetable oil
2 garlic cloves, minced
¼ cup onion, chopped
5 ounces beef (about 3/4 cup), cut into small pieces
⅓ cup kimchi, chopped
3 cups colorful vegetables,cut into small pieces (¼ inch cubes): carrot, zucchini, red bell pepper, yellow bell pepper, white mushrooms
1 or 2 green chili pepper (optional), chopped
2 green onions, chopped
1 egg, cooked sunny side up
2 teaspoons sesame oil
2 tablespoons oyster sauce
¼ teaspoon ground black pepper
½ cup Oaxacan cheese, split it into threads: replace with mozzarella or cheddar cheese