200g pork, thinly sliced
1 small onion, sliced
1 cup broccoli florets
1 cup spinach leaves
2 medium potatoes, peeled and diced
2 tablespoons vegetable oil
2 cloves garlic, minced
2 tablespoons soy sauce
1 tablespoon oyster sauce
1 teaspoon sesame oil
Salt and pepper to taste