Preheat your oven to 375 degrees f.
Using a paring knife, CAREFULLY cut and remove the core, then discard as shown.
Try not to take out too much as your cauli head still needs to hold together in one piece for this.
Prepare a baking dish large enough to fit the whole cauliflower, and grease it with half a tablespoon of your divided oil.
Add the head of cauliflower, cut side down. Drizzle with remaining oil and sprinkle with smoked paprika, sea salt, and pepper.
Rub in the seasonings with your hands to get it all well coated.
Roast for 50-60 minutes, or until it's browned on the outside and a skewer pokes into it very easily (I love the crispy outside crust this creates!) Cut into wedges and serve with lemon juice and fresh chopped parsley.