Whisk together marinade ingredients in a large bowl.
Add the steak, toss to thoroughly coat.
Cover with plastic wrap and allow to marinate at room temperature for 30 minutes. Or, place in the refrigerator for several hours or overnight.
Heat grill to HIGH. Place steak on grill and grill until golden brown and slightly charred, about 4 to 5 minutes. Turn steak over and continue cooking on the other side for 3 to 4 minutes for medium-rare (130 degrees) or 5 to 7 minutes for medium (135 degrees).
Cover steak with foil and allow to rest for 10 minutes, then slice thinly.
To make the Dressing
Pour the marinade into a saucepan and simmer for 5 minutes. Whisk in the rice wine vinegar and oil.
Toss salad ingredients together in a large bowl, then divide between two plates.
Place steak slices over salad and top with dressing, peanuts, and toasted sesame seeds. Serve immediately.
Notes
Make sure you save the marinade, it will become the dressing!
The salad ingredients were chosen because they are pretty typical ingredients that you would find in an Asian style salad. Feel free to add your favorites or omit things that you do not like.