Florentine Meatballs

Ingredients

• 1 (10 oz) box frozen spinach, defrosted, cooked, and squeezed dry
• 2 packages (2 to 2 3/4 lb) ground turkey breast
• olive oil
• 1 medium onion, finely chopped
• 3 garlic cloves, chopped
• 1 large egg
• 1 3/4 cup milk
• 3/4 cup bread crumbs
• 1/2 cup Parmigiano-Reggiano
• salt and pepper
• 2 Tb butter
• 2 Tb flour
• 1 cup chicken stock or broth
• 1 (10 oz) sack shredded provolone cheese or blend of Italian cheeses