Place a rack in the center of your oven and preheat to 275°F. With paper towels, pat the pork steaks dry. Season all over with the salt and pepper. Line a rimmed baking sheet with parchment paper for easy clean up. Place a wire rack on top, then place the pork on the rack. Let stand at room temperature for 30 minutes or refrigerate for up to 1 day.
Bake the pork steaks until the pork registers 120°F to 125°F on an instant read thermometer inserted at the thickest part, about 20 to 25 minutes (the pork isn't done yet!). If some pieces finish sooner than others, remove them to a plate while you continue baking the rest.
In a large cast iron or similar heavy-bottomed skillet, heat 1 tablespoon of the oil over medium high heat until it's screaming hot. Carefully place two of the steaks in the skillet. Let cook on the first side without disturbing until you have a nice crust, about 3 minutes. Flip and cook on the other side until the steaks register 145°F on an instant-read thermometer, 2 to 3 minutes more. Set aside. Repeat with the remaining steaks, adding more oil if needed. Cover and let rest for at least 5 minutes.
To make the sauce, reduce the heat to medium. Add the green onion and garlic and cook until super fragrant, about 30 seconds. Add the wine (or broth) and soy sauce, scraping up any browned bits that are stuck to the pan.
Bring the sauce to a simmer. Let cook until reduced by a little more than half, about 5 minutes, stirring periodically. Remove from the heat and stir in the butter.
Serve the pork steak with the sauce spooned over the top and additional salt and pepper to taste.
Notes
If your pork steaks are larger (our store often sells them in 2-packs of very long, 1+ pound pieces), trim them in half crosswise to make an 8-ounce portion)
Bake/sear method adapted from America's Test Kitchen
TO STORE: Refrigerate leftover pork steak in an airtight storage container for up to 3 days.
TO REHEAT: Gently rewarm pork steaks in the oven at 350°F, in the microwave, or in a skillet on the stove.
TO FREEZE: Freeze leftover pork steaks in an airtight freezer-safe storage container for up to 3 months. Let thaw overnight in the refrigerator before reheating.