Preheat oven to 425°F. Line a large baking sheet with parchment paper.
Slice the cauliflower into 1 ½-inch thickness, making sure to leave the large stem at the bottom intact. You should get about 4-6 “steaks”. Keep the extra florets that fall off for another use.
In a small bowl, combine the olive oil, lemon juice, paprika, garlic powder, cumin, salt and pepper.
Place cauliflower slices in a single layer onto the prepared baking sheet. Brush each slice with the olive oil mixture on both sides.
Roast in the oven until golden brown, about 20-25 minutes, flipping carefully halfway.
Serve immediately drizzled with Chimichurri sauce, if desired.
Notes
Storage: Store any leftovers in an airtight container in the fridge for up to 4 days. The cauliflower will soften in the fridge and best reheated in the oven at 350°F for 5 minutes.Freezing: While it's best to enjoy this side dish fresh from the oven, you can freeze any leftovers. Place flat in a freezer bag and freeze for up to 3 months. Cook from frozen in the oven at 350°F for 10 minutes.