Red Cabbage Ragù

Name: Red Cabbage Ragù
Cook time: 1 h
Total time: 1 h
Cuisine: European, Italian, Mediterranean
Ingredients: 6 tablespoons extra-virgin olive oil, plus more as needed; 1 medium red cabbage (1 1/2 to 2 pounds), cut through the core into 6 wedges; Kosher salt and black pepper; 1 red or yellow onion, coarsely chopped; 5 garlic cloves, coarsely chopped; 4 1/2 ounces (1 tube) double concentrate tomato paste, or 6 ounces (1 can) tomato paste; 1/3 cup red wine; 3/4 cup coarsely chopped parsley (from 1 1/2 cups leaves and tender stems); 1 teaspoon granulated sugar; 1 teaspoon red-pepper flakes (optional); 1 pound tube pasta, like rigatoni or paccheri