Instructions

  1. Preheat oven to 400ºF.
  2. Mix garlic and oil in large baking dish.
  3. Bake until garlic is tender, about 30 minutes.
  4. Cool.
  5. Press garlic between fingertips to release cloves.
  6. Puree garlic in processor.
  7. Cook potatoes in large pot of boiling salted water until just tender.
  8. Drain.
  9. Return potatoes to pot.
  10. Mash with potato masher.
  11. Add milk and butter and continue mashing until well blended.
  12. Mix in garlic puree and all remaining ingredients.
  13. Season to taste with salt and pepper.
  14. Transfer potatoes to 6-cup baking dish.
  15. (Can be prepared 1 day ahead. Cover and refrigerate. Bring to room temperature before continuing).
  16. Bake potatoes until heated through, about 20 minutes.
  17. Spoon onto plates and serve.