Maple Plank-Grilled Italian Stuffed Pork Chops

INGREDIENTS

• 1 large, maple grilling plank
• 4 (6 ounce) boneless pork loin chops, about 2 inches thick
• 2 tablespoons butter
• 1 onion, chopped
• 1 tablespoon chopped garlic
• 1 stalk celery, chopped
• 2 cups fresh spinach leaves
• 1 (14.5 ounce) can chicken broth
• 2 cups garlic seasoned croutons
• 1/2 cup shredded Italian cheese blend
• 2 tablespoons freshly grated Parmesan cheese
• 2 teaspoons fresh rosemary, chopped
• salt and ground black pepper to taste