Put onion, pear, and garlic in a blender and puree until smooth. Pour the puree to the pan, add ground beef and sugar (if you wish). Cook over medium heat. Smash the beef with spatula to remove any clumps as you cook.
When the beef is cooked and the mixture is brownish in color, add gochujang and mix well. Add honey and thicken the sauce over medium low heat for 3-5 minutes. Don't thicken too much. The sauce will get thicken even more as it rest and stored in the fridge.
Remove from heat, drizzle sesame oil, add sesame seeds and corn syrup for shine. Mix well until combined. Store in a airtight container in the fridge for a couple of month.
Note: Serve as Bibimbap sauce or topping for plain rice.