Preheat the oven to 300°F Put the garlic in a small baking pan or ramkin and drizzle with the olive oil and vermouth. Bake in the oven for 40 minutes to 1 hour or until brown and very soft.
Cool the garlic then peel the cloves, purée them in a small food processor and reserve.
Bring a large pot of salted water to a boil and add the potatoes. Boil for 20 to 40 minutes or until very tender. Reheat the oven to 350°F. Peel the potatoes and rice them into the bowl of a stand mixer fitted with the whip attachment.
Whip the potatoes with the butter and reserved garlic, then whip in the liquid. Season with salt and pepper. Turn the potatoes into a baking dish and cover with aluminum foil. Bake in the oven until heated through, 20 to 30 minutes.
Cook's Notes
Yield
4 to 6 servings
Ingredient Notes
Use as much butter and liquid as you like to get the potatoes to your desired consistency.