Preheat the oven to 350 degrees.
Slice the cabbage into 4 wedges.
Drizzle olive oil in a skillet over medium heat and char the cabbage on both sides until brown. Remove the cabbage from the skillet, place the wedges on a plate, season with salt and pepper, and set aside.
Coat the skillet with more olive oil, add the onions, salt, and pepper, and sauté for 3 minutes. Add the garlic and sauté for another minute.
Add the dried mustard seeds and tomato paste and stir. Allow the ingredients to marry for 3 minutes.
Pour the Sherry into the skillet and use a rubber spatula or wooden spoon to remove any bits from the bottom of the skillet and cook for 2-3 minutes. Be sure to allow the alcohol to completely cook out.
Pour in the chicken broth and stir. Add the cabbage wedges to the skillet and place in the oven for a total of 40 minutes. Flip the cabbage after 20 minutes of cooking.
Remove the skin from each chicken thigh, rinse, and pat dry with a paper towel. Place the chicken skins on a lined baking sheet, season with salt Shallot & Garlic Blend, and roast in the oven at 400 degrees for 20 mins. Flip the chicken skin 10 minutes into cooking. Drain and pat dry with paper once it’s done cooking and crumble into small bits with your fingers.
Plate the wedges on a serving platter and pour the sauce over the cabbage with a ladle. Garnish with whole Dijon mustard, crumbled chicken skin, and parsley. Serve immediately and enjoy!