Pat the pork tenderloins dry and trim any silver skin.
This helps the sauce cling and keeps the texture tender.
In a bowl, whisk together honey, soy sauce, garlic, ketchup, vinegar, sesame oil, black pepper, red pepper flakes, and chicken broth.
Place the pork into the crockpot in a single layer if possible. Pour the sauce over the top, turning the pork so it’s coated.
Cover and cook on Low for 3.5 to 4.5 hours or on High for 1.75 to 2.5 hours, until the pork reaches 145°F in the thickest part and is very tender. Avoid overcooking.
Transfer the pork to a cutting board and tent loosely with foil to rest for 5–10 minutes.
Pour the cooking liquid into a small saucepan.
In a cup, stir cornstarch and water to make a slurry. Whisk into the saucepan and bring to a simmer over medium heat. Cook 2–3 minutes until thick and glossy.
Slice the pork into medallions or shred it, depending on how you want to serve it.
Return to the pot or platter and spoon sauce over the top.
Garnish with sliced green onions and sesame seeds. Serve over rice, mashed potatoes, or with steamed vegetables.