How to Make It
Remove the thin outer membrane on back of ribs by loosening with a butter knife and pulling it off; discard. Combine five spice, pepper, garlic powder, and ground ginger in a small bowl; sprinkle both sides of ribs with spice mixture. Place slab in a ring, meat-side facing out, in the circular wire steam rack of an Instant Pot. Place rack in Instant Pot.
Add stock, soy sauce, vinegar, mirin, garlic, shallots, ginger, and star anise in center of rib ring. Close and lock lid, and program cooker to cook on manual on High Pressure for 25 minutes. Turn pressure release valve to venting postion to release steam completely. Carefully remove lid.
Transfer ribs to a wire rack set on a sheet tray; set aside. Pour sauce through a fine wire-mesh strainer into a bowl; discard solids. Return sauce to Instant Pot. Program cooker to Sauté, and stir in honey and chili-garlic sauce. Whisk together cornstarch and water in a small bowl until combined; when sauce begins to boil, slowly whisk in cornstarch mixture, and cook, whisking often, until sauce has thickened, about 5 minutes. Brush about 1/4 cup of the sauce over ribs.
Preheat broiler, and place oven rack in middle of oven. Place ribs on a baking sheet, and broil until sauce bubbles and becomes lightly caramelized, 3 to 5 minutes. Remove from oven, and let rest 5 minutes. Sprinkle with cilantro and sesame seeds; serve with remaining sauce.