Whisk the vegetable oil with the fish sauce, ginger and garlic in a large bowl; transfer 2 tablespoons to a large resealable plastic bag and add the steak. Turn to coat, then set aside to marinate, 10 minutes. Whisk the rice vinegar into the bowl with the remaining marinade; set aside.
Meanwhile, microwave the edamame as the label directs. Add the edamame, broccoli slaw and cucumbers to the bowl with the vinegar mixture; toss to coat, then set aside.
Preheat a grill pan over medium heat and brush with vegetable oil. Sprinkle the sesame seeds over the steak and toss to coat, pressing to adhere. Grill the steak and tofu until the steak is just cooked through and the tofu is marked, about 4 minutes per side for each. Top each serving of the vegetable mixture with a piece of tofu, some steak and the herbs.
Photograph by Ryan Dausch