Combine the soy sauce, rice wine, honey, 1 teaspoon of the sesame oil, and the garlic in a shallow dish.
Place the fillets in the dish and turn to coat. Marinate for 30 minutes in the refrigerator.
Place the potatoes in a pot of cold water. Bring to a boil and cook until tender, about 15 minutes; drain. Toss the potatoes with the sesame seeds, salt, 3 tablespoons of the vegetable oil, and the remaining sesame oil.
Transfer to a roasting pan lined with aluminum foil or parchment paper. Roast for 25 minutes.
Heat the remaining vegetable oil in a nonstick skillet over medium-high heat.
Let the excess marinade drip from the fillets and saut them for 1 to 2 minutes per side or until browned.
Transfer to a baking pan and roast 3 to 4 minutes for medium rare. Meanwhile, add the remaining marinade to the skillet. Boil and cook for 1 minute.
Serve over the fillets with the potatoes and snow peas.