Ampalaya con Carne

Name: Ampalaya con Carne
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: Asian
Ingredients: 2 large ampalaya (halved lengthwise, seeded and sliced thinly); 1/2 pound top sirloin (sliced thin and cut into strips); 1/4 cup oyster sauce; 1/4 cup soy sauce; 1 tablespoon sesame oil; salt and pepper to taste; 2 tablespoons oil; 1 onion (peeled and sliced thinly); 4 cloves garlic (peeled and minced); 1/2 cup water; 1 teaspoon sugar; 1 teaspoon cornstarch