In a large bowl combine ground turkey, breadcrumbs, grated Parmesan, egg, minced garlic, grated onion, parsley, oregano, paprika, salt, and pepper; mix gently until just combined.
Chill the mixture 10 minutes to firm up for easier shaping.
Shape into 18–24 even meatballs (about 1½ inches each) using wet hands to prevent sticking.
Heat olive oil in a large skillet over medium heat until shimmering.
Add meatballs in a single layer and sear 2–3 minutes per side until golden brown.
If excess fat accumulates, remove a bit, then return meatballs to the pan.
Pour in chicken broth or marinara sauce to come halfway up the sides of the meatballs.
Reduce heat to low, cover, and simmer 10–12 minutes until internal temperature reaches 165°F (74°C).
If baking instead: place meatballs on a rimmed baking sheet, spray lightly, bake at 400°F (200°C) for 18–22 minutes, then toss in warmed sauce.
Transfer to a serving dish, spoon sauce over, garnish with extra parsley and grated Parmesan; serve hot.