Grilled Cheese with Pulled Short Ribs and Pickled Red Onions

Name: Grilled Cheese with Pulled Short Ribs and Pickled Red Onions
Ingredients: 1 2 pound loaf sourdough bread , cut into 16 slices; 1 cup red wine (such as cabernet sauvignon); 1 tablespoon grapeseed or canola oil; 1 teaspoon peppercorns; 1/2 carrot, cut into large dice; 1/2 celery, cut into large dice; 1/2 onion cut into large dice; 2 pounds boneless beef short ribs; 2 tablespoons plus 2 teaspoons Pickled Red Onions; 3 cups beef broth; 4 sprigs flat leaf parsley; 4 teaspoons grapeseed oil; 4 teaspoons unsalted butter, room temperature; 6 medium cloves garlic, cracked; 6 sprigs thyme; Salt and pepper to taste