Beef Tenderloin With Aromatic Thai Spices

Name: Beef Tenderloin With Aromatic Thai Spices
Ingredients: 1/4 cup plus 2 tablespoons vegetable oil; 4 garlic cloves, thinly sliced; Four 8-ounce beef tenderloin steaks, about 1 1/2 inches thick; 2 shallots, thinly sliced; Eight 1-inch rosemary sprigs; 10 thyme sprigs; 7 kaffir lime leaves, chopped; Six 1-inch strips of orange zest; 2 tablespoons Asian fish sauce; 1/3 cup low-sodium soy sauce; 10 dried Thai chiles, coarsely chopped; 1 tablespoon unsalted butter; 1 tablespoon extra-virgin olive oil