1 tablespoon sesame oil
1 medium onion, chopped
1 tablespoon minced fresh ginger
2 garlic cloves, minced
1 1/2 pounds 93% lean ground beef
1/2 cup plum jam
3 tablespoons hoisin sauce, sauce
2 tablespoons lower sodium soy sauce
4 teaspoons chili garlic sauce
1 tablespoon brown sugar
2 scallions, thinly sliced
2 tablespoons toasted sesame seeds
4 potato sandwich buns