01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - Arrange cabbage wedges on the prepared baking sheet, cut sides up. Drizzle with olive oil and season with black pepper.
03 - In a small bowl, combine softened butter, miso paste, soy sauce, maple syrup, rice vinegar, minced garlic, and ginger. Mix until smooth.
04 - Spread about half the miso butter over the tops of the cabbage wedges.
05 - Roast in the oven for 20 minutes. Remove from oven, gently flip wedges, and spread the remaining miso butter on the new top sides.
06 - Roast for an additional 15 minutes, or until cabbage is golden, tender, and lightly caramelized at the edges.
07 - Transfer to a serving platter. Garnish with toasted sesame seeds, green onions, and chili flakes if desired. Serve warm.