Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.
Remove the greens from the cauliflower and place the head upright on a cutting board. Carefully slice the cauliflower into 1-inch thick steaks. You should get about 2-3 sizeable steaks and several florets.
In a mixing bowl, combine the olive oil, minced garlic, thyme, rosemary, smoked paprika, salt, and pepper. Mix well to create a herb-infused oil.
Brush both sides of the cauliflower steaks with the garlic herb oil mixture, ensuring they are evenly coated. Use any leftover mixture to toss the florets.
Arrange the cauliflower steaks and florets on the prepared baking sheet in a single layer.
Roast in the preheated oven for 25-30 minutes, flipping the steaks halfway through, until golden brown and tender.
Once cooked, remove from the oven and let them rest for a few minutes.
Serve the garlic herb cauliflower steaks garnished with freshly chopped parsley for added freshness and color.
Notes
For a spicier kick, add red pepper flakes to the herb oil.