Add all the meatball ingredients to a large mixing bowl. Using clean hands, incorporate the ingredients into each other until evenly distributed.
Use a 1½ tablespoon cookie scoop to divide the meatball mixture into 18 meatballs. Roll each portion between the palms of your hands to create a smooth ball.
Heat a 10-inch skillet over medium-low heat. Once the skillet is warm, add the avocado oil and swirl it around the pan to coat. Transfer the meatballs to the pan.
Cook the meatballs for about 8 minutes total, 2 minutes per side, until they are evenly browned on all sides.
While the meatballs are browning, make the sticky gochujang sauce. In a small mixing bowl, combine the honey, tamari, fish sauce, gochujang, grated garlic, and 2 tablespoons of water. Whisk the sauce well.
Drain all but about 1 tablespoon of the beef fat from the skillet, then pour the sticky gochujang sauce over the meatballs. Stir the meatballs to coat them in the sauce. Bring to a boil and allow to simmer for about 2 minutes, stirring periodically.
Meanwhile, whisk the remaining 1 tablespoon of water with the cornstarch in a small bowl. This is a slurry, which will help to thicken the sauce. Pour the slurry over the pan and stir well to incorporate it into the gochujang sauce. Simmer for a further 2 minutes, stirring frequently, then remove the meatballs from the heat.
Serve immediately. See the recipe above for suggested serving accompaniments.