Preheat oven to 375°F.

Carefully slice each potato crosswise, about 8 times or every ⅛-inch, but not slicing all the way through to the bottom, leaving about ¼-inch intact on the bottom. 

Place potatoes on a large rimmed baking sheet and sprinkle garlic evenly over all potatoes. Drizzle with olive oil and sprinkle with salt and pepper. 

Bake for 45-60 minutes or until tender and browned.

From the Joy of Kosher Cookbook. Order your copy, for 199 more recipes.