Preheat your oven to 325°F.
Season both sides of the chuck roast generously with salt and pepper.
Heat a Dutch oven over medium-high heat and add half of the sesame oil.
Sear the chuck roast for about 5 minutes per side until a deep golden crust forms. Remove the roast and set aside.
Add the remaining sesame oil to the pot, then add the sliced onion, garlic, and ginger. Sauté for about 5 minutes until fragrant and softened.
Stir in the gochujang, honey, and soy sauce. Cook for 1 minute to let everything meld together.
Pour in the beef broth and stir well, scraping up any browned bits from the bottom of the pot.
Add the chuck roast back into the pot.
Cover and transfer to the oven. Bake for 2.5 to 3 hours, until the meat is fall-apart tender.
Serve over white rice with broccoli and top with green onions and sesame seeds.