To make dip, blend all ingredients in a high speed blender or food processor until smooth. Set in refrigerator until ready to use.
Preheat oven to 450 degrees F.
Fill a large pot with water, about 6-8 cups (or enough to cover potatoes by 2 inches), and bring to a boil. Add 1 teaspoon salt, then potatoes.
Simmer for 10 minutes, until potatoes are just fork tender. Turn off stove, and drain potatoes very well. Add potatoes back to the pot and set over the hot burner to dry off any remaining water.
Toss potatoes with olive oil, remaining 1/2 teaspoon salt and pepper. Spread out on baking sheet so they are not touching. Bake for 10 minutes, stir and flip. Then bake for 12 minutes longer, until potatoes are golden brown and crispy. Serve immediately with dip.