"Forget the work and start up your slow cooker..."
flank steak, cut into strips
Kosher salt
Freshly ground black pepper
large red bell pepper, sliced
large green bell pepper, sliced
medium white onion, sliced
inch piece of garlic, quartered
garlic cloves, peeled and smashed
low-sodium beef stock
low-sodium soy sauce
brown sugar
rice wine vinegar
sesame oil
cornstarch (optional)
Cooked rice, for serving
Sliced scallion, for garnish
White sesame seeds, for granish