In a large mixing bowl, combine the ground turkey, breadcrumbs, grated Parmesan, chopped parsley, egg, minced garlic, salt, pepper, and dried oregano. Mix gently until just combined.
Shape the mixture into small, even-sized meatballs, about 1 to 1.5 inches in diameter.
Heat olive oil in a large skillet over medium heat. Brown the meatballs on all sides for about 5-7 minutes total, turning carefully. They do not need to be fully cooked through at this point.
In the same skillet or a separate saucepan, combine pumpkin puree, chicken broth, ground sage, cinnamon, and nutmeg. Stir over medium heat until smooth and simmering.
Add the browned meatballs back into the skillet with the pumpkin sauce. Reduce heat to low, cover, and simmer gently for 15-20 minutes until meatballs are fully cooked and sauce thickens slightly.
Serve over pasta, rice, or with roasted vegetables and enjoy your Turkey Meatballs in Pumpkin Sage Sauce.