Preheat your oven to 425°F (220°C) and line a large baking sheet with parchment paper. Slice the cabbage into 1-inch thick rounds.

Combine the extra virgin olive oil, lemon juice, mustard, garlic powder, salt, and smoked paprika in a medium bowl and whisk until well blended.

Brush each cabbage steak with the marinade mixture, ensuring they are well covered.

Reduce the oven temperature to 400°F (200°C) and roast the cabbage steaks for 30 minutes, turning halfway through.

Check for tenderness, remove from the oven, and optionally sprinkle with parsley before serving.