STUFFED BEEF TENDERLOIN INGREDIENTS 4 teaspoons olive oil, divided. 2 shallots, minced. 1 package (8 ounces/ 226 g) sliced cremini mushrooms. 3 cloves garlic minced and divided. 1 tablespoon chopped fresh thyme, plus additional for garnish. 1 1/2 teaspoons chopped fresh parsley, plus additional for garnish. 1/4 cup dry sherry or red wine vinegar