Press the tempeh lightly with a paper towel to remove excess moisture, then cut into bite-sized cubes.
In a small bowl, whisk together the soy sauce, cornstarch, and a bit of water to create a thin slurry.
Heat the olive oil in a non-stick skillet over medium-high heat. Add the tempeh cubes and sauté until they are golden and crispy on all sides, about 5-7 minutes.
While the tempeh crisps, chop the broccoli into florets and slice the red bell pepper into thin strips. Mince the garlic and grate the fresh ginger.
Add the garlic and ginger to the skillet with the tempeh. Sauté for 1 minute until fragrant.
Toss in the broccoli and red bell pepper. Stir-fry for about 3-4 minutes until the vegetables are tender yet still crisp.
Pour in the soy sauce slurry, stirring gently to coat the tempeh and vegetables evenly. Allow the sauce to thicken slightly, about 1-2 minutes.
Remove from heat and serve immediately for a delicious, balanced plant-based dinner.