Five-spice powder contains 1/2 teaspoon each of crushed fennel seed or star anise, and ground pepper, cloves, ginger and cinnamon.
To make the marinade, combine the soy sauce, green onion, garlic, olive oil and five-spice powder in a shallow baking dish. Whisk to blend. Add the pork and turn once to coat. Cover and marinate in the refrigerator for at least 2 hours, preferably overnight, turning the pork occasionally.
Heat the oven to 400 F.
Remove the pork from the marinade and pat dry. Discard the marinade. In a large, ovenproof frying pan, heat the olive oil over medium-high heat. Add the pork and cook, turning as needed, until lightly browned on all sides, about 5 minutes. Add the 1/2 cup water to the pan.
Transfer the hot pan to the oven and roast until the pork is slightly pink inside and an instant-read thermometer inserted into the center reads 160 F. Transfer the pork to a cutting board, cover with a kitchen towel, and let rest for 10 minutes.
Meanwhile, place the pan over medium-high heat. Add the wine and deglaze the pan, using a wooden spoon to scrape up any browned bits. Add the yellow onion and cook for about 1 minute. Add the cabbage and 1 tablespoon of the remaining water. Stir well, reduce the heat to medium, cover and simmer until the cabbage is wilted, about 4 minutes. Add 1 to 2 tablespoons additional water, if needed.
Slice the pork tenderloin into 8 medallions. Divide the medallions and the wilted cabbage among individual plates and garnish with parsley. Serve immediately.
This recipe is one of 150 recipes collected in "The New Mayo Clinic Cookbook," published by Mayo Clinic Health Information and Oxmoor House, and winner of a James Beard award.
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