Italian Sausage Stuffed Pork Chop

Name: Italian Sausage Stuffed Pork Chop
Ingredients: 8 ounces unsalted butter; 2 ounces extra-virgin olive oil, plus more for searing; 1 Vidalia onion, thin julienne; 1 cup diced celery; 4 cloves garlic, split in 1/2 and sliced paper thin; 1 pound sweet Italian sausage, removed from casing; 8 ounces baby spinach; 1/2 cup croutons; 3 cups chicken stock; 3 ounces heavy cream; 1/2 bunch flat-leaf Italian parsley, chopped; 1 1/2 cups grated Parmigiano-Reggiano; Kosher salt and freshly ground black pepper; 4 (8-ounce) bone-in center cut pork chops, frenched, marinated in extra-virgin olive oil, sliced shallots and Italian herbs