Ingredients:
1 pound beef sirloin, thinly sliced
1 red bell pepper, thinly sliced
1 green bell pepper, thinly sliced
1 small onion, thinly sliced
2 cloves garlic, minced
2 tablespoons vegetable oil
1 tablespoon soy sauce
1 tablespoon hoisin sauce
1 teaspoon cornstarch
1/4 teaspoon ground black pepper
1/4 teaspoon salt
