Wash vegetables and chop up the peppers and onion into thin slices. Chop tomato into thin slices.
Heat some of the toasted sesame oil on med-high. Add the peppers, onion, tomato, and mushrooms into a large skillet. Season with salt and pepper and make sure they get coated thoroughly with the oil. Sauté on high until nice and browned. Set aside.
Pour a tiny bit of olive oil on both sides of the sandwich bread. Spread Vegenaise on both sides and mix with the oil. Sprinkle Italian seasoning on the Vegenaise/olive oil mix. Add vegetables and put a leaf of lettuce on top. Enjoy!