01 -  Preheat oven to 400°F. Line a baking sheet with parchment paper. 
 02 -  In a large bowl, mix ground meat, onion, garlic, breadcrumbs, egg, milk, parsley, salt, and pepper until just combined. Avoid overworking the mixture. 
 03 -  Form the mixture into 20 to 24 small meatballs and arrange them on the prepared baking sheet. 
 04 -  Bake meatballs for 18 to 20 minutes, or until browned and fully cooked through. 
 05 -  While meatballs bake, combine cherries, balsamic vinegar, brown sugar, honey, soy sauce, and chili flakes in a saucepan over medium heat. Simmer for 8 to 10 minutes, stirring occasionally, until cherries are softened. 
 06 -  Mash softened cherries in the saucepan for a chunky consistency, or use a blender for a smooth sauce. 
 07 -  Add cornstarch slurry to the saucepan and simmer for 2 to 3 minutes, stirring, until the glaze thickens. 
 08 -  Add baked meatballs to the pan with the glaze. Toss to coat evenly, and simmer for 2 to 3 minutes to absorb flavors. 
 09 -  Serve meatballs hot, garnished with additional parsley if desired.