To roast the garlic, preheat the oven to 400 degrees F. Cut a garlic bulb in half crosswise and place the halves on a sheet of foil. Drizzle each cut side with 1 teaspoon of olive oil and sprinkle with 1 teaspoon of kosher salt. Fold the foil up around the garlic halves and the seal the foil into an airtight package. Roast until golden and soft, about 1 hour.