Turkey Meatballs

Name: Turkey Meatballs
Prep time: 25 min
Cook time: 30 min
Total time: 55 min
Cuisine: American
Ingredients: 2 lbs ground turkey; 2 Tbsp olive oil; 1 Tbsp butter (unsalted); 1 cup onion (minced); 2 cloves garlic (minced); 1/2 cup fresh parsley (minced; plus more for garnish); 1/4 cup green onion (thinly sliced); 1/4 cup chicken broth; 1 Tbsp Worcestershire sauce; 1 egg (beaten); 1/2 cup bread crumbs (seasoned); 1/2 cup Parmesan cheese (grated); 1 tsp kosher salt (plus more to taste); 1/4 tsp black pepper; 2 cups chicken broth; 1 1/2 Tbsp Worcestershire sauce; 1/2 cup water (cold); 2 Tbsp cornstarch