Slice the tempeh into bite-sized 1/2-inch cubes for maximum surface area and crispiness.
In a small glass bowl, whisk together the tamari, rice vinegar, minced ginger, and minced garlic to create the stir-fry sauce.
Heat the sesame oil in a large non-stick skillet or wok over medium-high heat until shimmering.
Add the tempeh cubes to the skillet, cooking for 5-7 minutes while turning occasionally until every side is golden brown and crispy.
Toss in the broccoli florets along with a tablespoon of water, then cover the pan for 2 minutes to lightly steam them until they are bright green.
Remove the lid and add the edamame, sea salt, and black pepper, stirring frequently for another 2 minutes.
Pour the prepared sauce over the vegetables and tempeh, tossing constantly for 1 minute until the glaze thickens and coats every piece beautifully.