Chinese or Japanese eggplants (long, slender purple variety), cut into bite-sized wedges • medium shrimp, peeled and deveined • ground pork (or thinly sliced beef/pork) • green onions (scallions), cut into 2-inch sections • garlic, minced • ginger, minced • neutral cooking oil • oyster sauce • light soy sauce • dark soy sauce (optional, for richer color) • sugar • water or chicken stock •