Peppercorn Roast Beef With Herbed Yorkshire Puddings

2 eggs ½ cup milk ½ cup beef broth 1 tablespoon vegetable oil 1 cup all-purpose flour 1 tablespoon finely chopped shallot (1 medium) or green onion (1) ½ teaspoon salt ½ teaspoon snipped fresh thyme ¼ teaspoon freshly ground black pepper 2 tablespoon shortening