Preheat the oven to 350°F.

Combine ground beef, bread crumbs, egg, and salt in a large bowl and mix well.

Form mixture into 15 evenly shaped meatballs and place on a baking sheet lined with parchment paper.

Bake for 20 minutes or until internal temperature reaches 165°F.

While meatballs are baking, prepare sauce by whisking together sugar, water, ketchup, vinegar, and soy sauce in a small saucepan over medium heat. Simmer and stir for 5 minutes until thickened.

Mix cornstarch with a small amount of water to create a slurry, then add to the sauce to thicken further.

Toss the baked meatballs with the sauce until evenly coated.

Serve warm garnished with fresh herbs if desired.