Whole Roasted Cauliflower with Lemony Yogurt Sauce

INGREDIENTS

(1 1/2- to 2-pound) head cauliflower with leaves

1/3 cup

kosher salt

to 2 teaspoons nice, flaky sea salt, such as Maldon

3 tbsp

best-quality extra-virgin olive oil, divided

1 cup

Greek yogurt (I'm partial to Fage)

1 tbsp

freshly squeezed lemon juice

1 tsp

kosher salt or to taste

extra-virgin olive oil, optional

za'atar, optional