Recipe works best if you very thinly slice all the veggies with a mandoline. Warm the oil in a large skillet over high heat. Stir in onions, and mushrooms, cook 5 minutes or until softened/lightly browned. Add zucchini, and cook, stirring, about 1 minute. Stir in teriyaki sauce, soy sauce and cook until zucchini are tender, about 3 minutes. Stir in ground pepper and sprinkle seame seeds on top, and serve immediately.