Chop the tempeh in blocks and the broccoli in small pieces. Cook both in separate pans, you do it with some oil but also with water or with nothing with a good non stick pan, since they’ll be covered in the sauce. In the meantime make the sauce: mix oil, teriyaki sauce and maple syrup and mix. Then add cornstarch and mix until there are no more lumps. Then add water to thin. When the broccoli and tempeh are done ( broccoli is soft or how you prefer it and tempeh is golden) set aside and take one of the pan you used and on low heat pour the sauce in it. Stir constantly until it changes consistency and becomes sticky. When it reaches a consistency you like, take it off the heat and add tempeh and broccoli. Stir to coat and serve over rice and sprinkle with black sesame seeds!