Preheat oven to roast at 375. Cut the cauliflower into 2 (1-inch) steaks from the center part of each cauliflower (you will have 2 steaks per cauliflower).
Place in a roasting pan and drizzle with extra virgin olive oil, salt, turmeric, and cumin.
Place in the oven and roast for 20 minutes, flipping after 10 minutes.
Remove when the edges are browned and the cauliflower is fork-tender.
Meanwhile, mix together the kefir, garlic, lime zest, and salt.
Pour over the hot cauliflower ad serve immediately.