1. Preheat oven to 500°.
2. Combine 1 tablespoon olive oil, vinegar, 1/2 teaspoon salt, shallots, and endive in a roasting pan; toss well to coat. Arrange vegetables evenly down the center of the pan.
3. Combine remaining 1 teaspoon oil, remaining 1/2 teaspoon salt, rosemary, and next 5 ingredients (through garlic) in a small bowl. Rub rosemary mixture onto pork. Arrange pork on top of vegetables. Bake at 500° for 17 minutes or until a thermometer registers 155°. Let vegetables and pork stand 10 minutes. Cut pork crosswise into 12 slices.