6 medium Japanese eggplants (about 1 pound), tops trimmed, halved lengthwise
1/4 cup canola oil
Kosher salt and freshly ground black pepper
1 pound ground pork
1 bunch scallions, thinly sliced, white and green parts separated
6 cloves garlic, minced
One 2-inch knob ginger, peeled and finely grated
2 to 4 tablespoons chili-garlic sauce or sambal oelek
1/4 cup soy sauce
1/4 cup balsamic vinegar
Steamed white rice, warm, for serving