Preheat oven to 400 degrees. When ingredient appears in recipe, remove from packaging. Thoroughly rinse any fresh produce and pat dry.
Combine ¼ cup water, demi-glace, and cornstarch in bottom of provided tray.
In a mixing bowl, combine ground beef, panko, Parmesan, ¼ tsp. salt, and a pinch of pepper. Form ground beef mixture into eight equally-sized meatballs. Place meatballs around outside edge of tray.
If using ground pork or ground turkey, follow same instructions.