Cut your cabbage in half, pull out that thick core, and chop the halves into 1-inch pieces.
Brush olive oil all over the wedges and sprinkle with salt and pepper on all sides evenly.
Put wedges on your baking sheet in one layer without any overlapping for even roasting.
Roast at 450°F for 20-25 minutes, flipping halfway until edges are golden and crispy.
Whisk olive oil, vinegar, soy sauce, mustard, and garlic in a small bowl until combined.
Stir in Parmesan cheese and add salt and pepper to taste until the dressing tastes perfect.
Move roasted cabbage to a serving plate and drizzle with dressing while it's still warm.
Add chopped bacon and chives on top if using, and serve right away for best results.