Cut the tempeh into 1/2-inch cubes and set aside.
In a small mixing bowl, whisk together the peanut butter, tamari, rice vinegar, grated ginger, and minced garlic until smooth.
Heat the sesame oil in a large non-stick skillet or wok over medium-high heat.
Add the tempeh cubes to the skillet and sear for 5-7 minutes, turning occasionally, until all sides are golden brown and crispy.
Add the broccoli florets, sliced red bell pepper, and shelled edamame to the skillet.
Sauté the vegetables with the tempeh for 4-5 minutes until the broccoli is tender-crisp and bright green.
Pour the peanut sauce over the stir-fry and toss continuously for 1 minute until the sauce thickens and coats every ingredient.
Season with sea salt and black pepper, then serve immediately.