Place the pork tenderloin in the freezer for about 30 minutes. This makes it firm and easier to slice thinly—aim for about 1/8 inch pieces for optimal cooking.

In a jar, combine the soy sauce, brown sugar, gochujang, and sesame oil. Secure the lid and shake well until everything is fully incorporated and the sugar dissolves.

Add the sliced pork to a bowl and pour the sauce over it. Toss to coat evenly, then let it marinate for at least 15 minutes—ideally, up to 4 hours in the fridge for deeper flavor.

Heat a cast-iron skillet over high heat. Sauté the marinated pork for 6-10 minutes, stirring occasionally, until it turns golden brown and is cooked through. Avoid overcooking to keep it tender!

Once cooked, toss in some sautéed greens and carrots for added color and nutrition. Serve the pork over fluffy rice for a delightful, complete meal.